Busy Philipps shows off underwear under a sheer white dress

Busy Philipps shows off underwear under a sheer white dress at a Lancome party in New York, while AnnaSophia Robb looks leggy in a white mini dress

Busy Philipps and AnnaSophia Robb wore wintery white dresses to the InStyle and Lancôme cocktail party held at the Park Lane Hotel in midtown Manhattan on Wednesday.

The Girls5Eva star, 44, flashed her black bra and panties under a white polka-dot sheer dress, black pumps and a matching handbag, chosen by stylist Karla Welch.

Hairstylist Kristin Heitkotter styled Busy's (née Elizabeth) cheeky ponytail.

Makeup artist Kindra Mann applied Philipps' shimmering eye shadow and bright red pout for the fashion festivities.

The Illinois-born blonde hung out among the likes of her Mean Girls co-star Avantika, author Tomi Adeyemi and singer Silas Silverman.

The busy Philipps wore a wintery white dress to the InStyle and Lancôme cocktail party held at the Park Lane Hotel in Midtown Manhattan on Wednesday AnnaSophia Robb also wore a wintery white dress

Busy Philipps (left) and AnnaSophia Robb (right) wore wintery white dresses to the InStyle and Lancôme cocktail party held at the Park Lane Hotel in midtown Manhattan on Wednesday

Busy admitted on Wednesday's episode of TODAY with Hoda & Jenna that dating apps like Raya were “not for me,” nearly two years after splitting from her husband of 13 years, Marc Silverstein.

Philipps and the 52-year-old “I Feel Pretty” director continue to amicably co-parent their two children — Birdie Leigh, 15; and Cricket Pearl, 10.

The Doing Her Best podcaster has been hard at work promoting her role as Mrs. George in Samantha Jayne and Arturo Perez Jr.'s big-screen adaptation of the Broadway musical Mean Girls, which opens this Friday in the US and January 17th cinemas in the UK.

The 112-minute remake also stars Tina Fey, Tim Meadows, Jon Hamm, Reneé Rapp, Angourie Rice, Avantika, Bebe Wood, Auli'i Cravalho, Christopher Briney, Jenna Fischer, Ashley Park and Busy Philipps.

The musical, directed by Jeff Richmond and Nell Benjamin, is based on Mark Waters' hit 2004 film, which was originally adapted from Rosalind Wiseman's 2002 book Queen Bees and Wannabes.

Busy will also reprise her role as Summer Dutkowsky in the six-episode third season of Girls5eva, premiering March 14 on Netflix.

Creator Meredith Scardino's critically acclaimed musical comedy about a one-hit-wonder '90s girl group – executive produced by Tina Fey and her husband Jeff Richmond – starring Renée Elise Goldsberry, Sara Bareilles and Paula Pell.

AnnaSophia embodied '60s glamor in a short-sleeved white mini dress with cutouts on the torso and matching accessories selected by image consultant Yael Quint.

The Girls5Eva star, 44, flashed her black bra and panties under a white polka-dot sheer dress, black pumps and a matching handbag, chosen by stylist Karla Welch

The Girls5Eva star, 44, flashed her black bra and panties under a white polka-dot sheer dress, black pumps and a matching handbag, chosen by stylist Karla Welch

Hairstylist Kristin Heitkotter styled Busy's (née Elizabeth) cheeky ponytail

Hairstylist Kristin Heitkotter styled Busy's (née Elizabeth) cheeky ponytail

Makeup artist Kindra Mann applied Philipps' shimmering eye shadow and bright red pout for the fashion festivities

Makeup artist Kindra Mann applied Philipps' shimmering eye shadow and bright red pout for the fashion festivities

The Illinois-born blonde mingled with the likes of her Mean Girls co-star Avantika (2-L), author Tomi Adeyemi (2-R) and singer Silas Silverman (R).

The Illinois-born blonde mingled with the likes of her Mean Girls co-star Avantika (2-L), author Tomi Adeyemi (2-R) and singer Silas Silverman (R).

Busy admitted on Wednesday's episode of TODAY with Hoda & Jenna that dating apps like Raya were

Busy admitted on Wednesday's episode of TODAY with Hoda & Jenna that dating apps like Raya were “not for me,” nearly two years after splitting from her husband of 13 years, Marc Silverstein

Philipps has been working hard to promote her role as Mrs. George in the big screen adaptation of Samantha Jayne and Arturo Perez Jr.'s Broadway musical

Philipps has been working hard to promote her role as Mrs. George in the big screen adaptation of Samantha Jayne and Arturo Perez Jr.'s Broadway musical “Mean Girls,” which opens in U.S. theaters this Friday and January 17th British cinemas are coming

The Doing Her Best podcaster will also reprise her role as Summer Dutkowsky in the six-episode third season of Girls5eva, premiering March 14 on Netflix

The Doing Her Best podcaster will also reprise her role as Summer Dutkowsky in the six-episode third season of Girls5eva, premiering March 14 on Netflix

The 30-year-old former child star wore her golden fringe locks in a pretty updo, secured with a trendy bow.

Robb made her bushy brows stand out and wore a pink shade on her lips and cheekbones.

The Tanqueray paid partner made sure to pose with Kiehl's CEO Ramzy Burns, who has been employed by the French cosmetics house for almost 34 years.

AnnaSophia, who married First Look Media legal director Trevor Paul 16 months ago, later hit the frozen streets of the Big Apple in a beige faux fur coat.

Robb recently filmed her role as the accidental founder of a hate group in Mercedes Bryce Morgan's short film ESC about cyberbullying that led to a mass shooting.

The Foy Vance video star plays a mysterious role in Jeremy Saulnier's Louisiana-set action thriller Rebel Ridge for Netflix.

And AnnaSophia will also star in Ken Kwapis' John Kennedy Toole drama Thelma alongside Kathy Bates, John Malkovich, Tim Blake Nelson and Stephen Root.

The cocktail party was also attended by Amanda Seyfried, Lancôme Brand Ambassador since 2019, and Isabella Rossellini, Lancôme Brand Ambassador since 1982, who welcomed the newest Global Ambassador Joy Sunday.

AnnaSophia embodied '60s glamor in a short-sleeved white mini dress with cutouts on the torso and matching accessories selected by image consultant Yael Quint

AnnaSophia embodied '60s glamor in a short-sleeved white mini dress with cutouts on the torso and matching accessories selected by image consultant Yael Quint

The 30-year-old former child star wore her golden fringe locks in a pretty updo, secured with a trendy bow

The 30-year-old former child star wore her golden fringe locks in a pretty updo, secured with a trendy bow

Robb made her bushy brows stand out and wore a pink shade on her lips and cheekbones

Robb made her bushy brows stand out and wore a pink shade on her lips and cheekbones

The paid Tanqueray partner made sure to pose with Kiehl's CEO Ramzy Burns (right), who has been employed by the French cosmetics house for almost 34 years

The paid Tanqueray partner made sure to pose with Kiehl's CEO Ramzy Burns (right), who has been employed by the French cosmetics house for almost 34 years

Robb recently filmed her role as the accidental founder of a hate group in Mercedes Bryce Morgan's short film ESC about cyberbullying that led to a mass shooting (pictured December 1).

Robb recently filmed her role as the accidental founder of a hate group in Mercedes Bryce Morgan's short film ESC about cyberbullying that led to a mass shooting (pictured December 1).

Also attending the cocktail party were Lancôme brand ambassador since 2019, Amanda Seyfried (l.), and Lancôme brand ambassador since 1982, Isabella Rossellini (r.), who welcomed the newest global ambassador, Joy Sunday (m).

Also attending the cocktail party were Lancôme brand ambassador since 2019, Amanda Seyfried (l.), and Lancôme brand ambassador since 1982, Isabella Rossellini (r.), who welcomed the newest global ambassador, Joy Sunday (m).

The 38-year-old Mean Girls alum (left) wore a black silk blazer over a white minidress and slingback heels chosen by stylist Elizabeth Stewart

The 38-year-old Mean Girls alum (left) wore a black silk blazer over a white minidress and slingback heels chosen by stylist Elizabeth Stewart

The 71-year-old daughter of Ingrid Bergman - who has had romances with David Lynch and Martin Scorsese - wore a leopard-print maxi coat and mules, as well as a black top and trousers

The 71-year-old daughter of Ingrid Bergman – who has had romances with David Lynch and Martin Scorsese – wore a leopard-print maxi coat and mules, as well as a black top and trousers

The 38-year-old Mean Girls alum wore a black silk blazer over a white minidress and slingback heels chosen by stylist Elizabeth Stewart.

The 71-year-old daughter of Ingrid Bergman – who has had romances with David Lynch and Martin Scorsese – wore a leopard-print maxi coat and mules, as well as a black top and trousers.

Isabella also rocked a matching red and leopard print manicure from nail artist Ami Vega.