Ariana Grande exudes glamor in plunging velvet dress as she's mobbed by fans at opening night of new boyfriend Ethan Slater's musical Spamalot

Ariana Grande showed her unwavering support for her new boyfriend Ethan Slater as she arrived to the opening night of his musical, Spamalot, on Thursday evening amid their controversial romance.

While the Wicked movie co-stars both faced allegations of infidelity on their former spouses after getting together, less than two months after their respective marriages crumbled, the singer, 30, appeared in high spirits as she prepared to watch her beau take the stage in Broadway’s revival adapted from the 1975 film Monty Python and the Holy Grail.

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

Her glamorous makeup look consisted of a bright red lipstick, several layers of mascara to bring attention to her beautiful brown eyes and blush on the apples of her cheeks.

The two-time Grammy winner wore her blonde hair in a sleek ponytail, reminiscent of her trademark half-up, half-down hairstyle that became just as famous as her when launching her music career in 2014. 

Supportive: While the Wicked movie co-stars both faced allegations of infidelity on their former spouses after getting together, less than two months after their respective marriages crumbled, the singer, 30, appeared in high spirits as she prepared to watch her beau take the stage in Broadway’s revival adapted from the 1975 film Monty Python and the Holy Grail

The Bang Band singer’s partner, who starred as the titular character in the SpongeBob SquarePants Broadway musical in 2017, will portray both Prince Herbert and the Historian in his latest production. 

For his big night, he was seen looking sharp in a black suit, coordinating tie and a white dress shirt. 

The father-of-one, 31, and Grande arrived separately at the event and did not pose for photos together at the red carpet ahead of the show.