AceShowbiz - Lady GaGa was among celebrities who flocked the Shrine Auditorium in Los Angeles on Monday evening, September 24 for the premiere of "A Star Is Born". During the event, the "Bad Romance" songstress oozed glamor as she posed on the red carpet in a shimmering metallic silver Givenchy Haute Couture gown.

The Mother Monster, who rocked matching platinum blonde which she styled in loose waves, paired the number with a diamond choker and diamond earrings from Bulgari. For the big night, she went for striking red lips and silver eyeshadow.

"I've always wanted to be an actress and this is more than I ever imagined," GaGa told reporters at the Toronto Film Festival earlier this month ahead of the film's first screening. "I am just so honoured and grateful and humbled."

Also attending the premiere was leading man Bradley Cooper. Cooper, who also served as director and producer of the romanctic film, looked dapper in a soft blue suit. The actor completed his style with a pair of black shoes.

Lea Michele was also among the attendees, looking stunning as ever in a silver-patterned maxi-dress featuring apron-style straps and a back bow that showed a little bit of her cleavage. The 32-year-old SAG Award winner, who attended the premiere with her stylist Brad Goreski, finished it off with a tidy updo and diamond earrings.

"A Star Is Born" follows Jackson Maine, a hard-drinking country musician (Cooper). He discovers and falls in love with a young singer named Ally (GaGa). GaGa will be credited as her real name Stefani Germanotta in the flick, which will hit U.S. theaters on October 5.

Take a look at celebrities' stunning styles while hitting the red carpet at the premiere.