'A Star Is Born': Lady Gaga is regal in Alexander McQueen at London premiere

A queen is born.

Lady Gaga stepped out for the London premiere of her first feature film, "A Star Is Born," on Thursday, and she delivered perhaps her best look of the film's press circuit yet.

The "Born This Way" singer was show-stopping in a Victorian-inspired Alexander McQueen gown on the red carpet for the premiere, providing for an incredibly regal moment. The white-and-gold gown featured an embellished, corset-style bodice with a ruffled collar and a harlequin print skirt. The dress featured a large cutout over the singer's cleavage, as well as dramatic, billowing drop sleeves. She finished off the look with her hair in a simple updo.

See Lady Gaga's London premiere look below:

Gaga's appearance at the London premiere came on the heels of the release of "Shallow" on Thursday afternoon. The release is the first song from the upcoming "A Star Is Born" soundtrack, which will be released the same day as the film hits theaters, Friday, October 5.

Listen to "Shallow" below: