AceShowbiz - Many celebrities gathered at Vue West End in Leicester Square in London on Thursday, September 27 to attend the U.K. premiere of "A Star Is Born". While leading lady Lady GaGa turned heads with her outrageous outfit as usual, others stars gracing the red carpet at the event looked equally stunning as the "Born This Way" hitmaker.

Among those who attended the premiere of the musical movie were Tom Jones, Noel Gallagher and his wife Sara MacDonald as well as Princess Diana's niece Lady Kitty Spencer. Bradley Cooper, who directed and starred in the flick, also made an appearance at the event.

On the same day of the U.K. premiere of the movie, GaGa released her collaboration with Cooper, "Shallow", along with its accompanying music video. According to the songstress, the song occurred at such a "crucial moment" in the film. "It's two people talking to each other and talking about the need and the drive to dive in to the deep end and stay away from the shallow area," she said.

Without further ado, let's take a look at what the stars wore at the premiere.