Ariana Grande oozes glamor in a plunging velvet dress as

Ariana Grande oozes glamor in a plunging velvet dress as she is surrounded by fans at the premiere of her new boyfriend Ethan Slater’s musical Spamalot

Ariana Grande showed her unwavering support for her new boyfriend Ethan Slater as she attended the premiere of his musical Spamalot on Thursday night amid their controversial romance.

While the “Wicked” co-stars both faced allegations of infidelity with their former spouses after getting together, the 30-year-old singer appeared to be in high spirits less than two months after their respective marriages collapsed prepared to watch her boyfriend on stage in a Broadway revival of the 1975 film “Monty Python and the Holy Grail.”

For the occasion, she wowed in a plunging velvet dress, which she paired with a pair of semi-sheer opera gloves, a leather clutch and dangling pearl earrings.

Her glamorous makeup look consisted of bright red lipstick, multiple coats of mascara to draw attention to her beautiful brown eyes, and blush on her cheeks.

The two-time Grammy winner wore her blonde hair in a sleek ponytail that was reminiscent of her signature half-up, half-down hairstyle that became as famous as she did when she began her music career in 2014.

Loving: Ariana Grande showed her unwavering support for her new boyfriend Ethan Slater as she attended the premiere of his musical Spamalot on Thursday night amid their controversial romance

Loving: Ariana Grande showed her unwavering support for her new boyfriend Ethan Slater as she attended the premiere of his musical Spamalot on Thursday night amid their controversial romance

Supportive: While the 'Wicked' co-stars both faced accusations of infidelity with their ex-spouses after getting together, the 30-year-old singer was in high spirits less than two months after their respective marriages collapsed , as she prepared to watch her boyfriend take the marital stage in the Broadway revival of the 1975 film

Supportive: While the ‘Wicked’ co-stars both faced accusations of infidelity with their ex-spouses after getting together, the 30-year-old singer was in high spirits less than two months after their respective marriages collapsed , as she prepared to watch her boyfriend take the marital stage in the Broadway revival of the 1975 film “Monty Python and the Holy Grail.”

The Bang Band singer’s partner, who played the title character in the 2017 Broadway musical “SpongeBob SquarePants,” will portray both Prince Herbert and the historian.