All of Lady Gaga's looks on the A Star Is Born press tour

Her role in Bradley Cooper’s A Star Is Born marks Lady Gaga‘s first foray into leading lady-dom, and the singer-turned-actress is certainly dressing for the occasion. A style chameleon ever since she first burst onto the zeitgeist in a homemade disco-mirrored bra, she has embraced this new phase in her career through her wardrobe, going full Hollywood glam on one press tour stop after another (starting with the film’s August premiere at the Venice Film Festival, pictured). Check out everything she’s worn on the Oscar-nominated music drama’s journey, ahead.

Gaga sartorially referenced Old Hollywood throughout the A Star Is Born press tour, but she saved Holly Golightly for last. The star hit the Oscars carpet in a strapless black gown with a structured hip detail by Alexander McQueen, accessorizing with black leather gloves and the 142-year-old, 128.54-carat Tiffany Yellow Diamond from Tiffany & Co. — previously worn by Audrey Hepburn for Breakfast at Tiffany’s publicity shots.

In this sparkling, asymmetrical strapless Celine dress by Hedi Slimane, Gaga brought glamour with a bit of an edge to the Grammys, where she picked up three trophies (two for A Star Is Born‘s “Shallow”). 

For the Academy’s annual nominee event, Gaga was regal in white custom Louis Vuitton with a high neck and statement sleeves.

Nominated at the SAG Awards, Gaga channeled Marilyn Monroe (not for the first time this season — keep reading!) in plunging, raw-edged Dior Haute Couture. 

Gaga accepted her Critics’ Choice Award (for which she tied with Glenn Close) looking angelic in this flowing, strapless blush gown from Calvin Klein By Appointment. 

Over two months into her awards season run and less than two weeks after opening night of her Vegas residency, Gaga mashed up Old Hollywood glamour and showgirl glitz in this tuxedo-inspired black dress and hand-painted black and gold cape, both by Ralph Lauren.

For her first major stop on the season’s parade of red carpets, Gaga opted for show-stopping Valentino couture. With a long train trailing behind her (which required two people to carry it) and voluminous puffed sleeves at her elbows, she topped the look with a high updo tinted to match the gown itself. 

For ELLE’s Women in Hollywood celebration, Gaga delivered an empowering speech in this exaggeratedly proportioned Marc Jacobs suit, which she chose after trying on “ten or so dresses,” she recalled at the podium. “This was an oversized men’s suit made for a woman. Not a gown. And then I began to cry. In this suit, I felt like me today,” she said. “Today, I wear the pants.” 

Gaga looked positively royal at the film’s U.K. premiere in gilded Alexander McQueen with puffed sleeves and a high ruffled neck. 

For an appearance on The Graham Norton Show, the singer wore a bright red off-the-shoulder Carolina Herrera gown with dramatic full sleeves. 

When the film made its Hollywood debut, Gaga gleamed in custom Givenchy with a cape and train. 

For the Toronto premiere, Gaga opted for a fitted black Armani Privé gown, with a sheer black veil that she flipped back around her shoulders into a cape. She topped it off with a sequined hat and Chopard earrings. 

After the TIFF premiere, Gaga kept her sparkly hat but changed into this structural black velvet dress, lined in pale pink, by Ralph and Russo. 

The star wore this one-shouldered deep red velvet gown by Ralph and Russo for the film’s TIFF press conference. 

Gaga dropped in on EW’s Must List party at TIFF in a glamorous sequined silver sheath. 

The diva hit the carpet for A Star Is Born‘s world premiere wearing this fluffy, feathery, fabulous pale pink Valentino haute couture gown. 

Having a major Marilyn moment at the film’s Venice photocall, Gaga opted for a full-skirted white dress.  

Nobody can say Gaga doesn’t know how to make an entrance. The star sailed up to the Venice Film Festival — yes, literally sailed — in a water taxi, wearing a tight, retro Victory roll hairstyle, a black bustier dress by Jonathan Simkhai, and black stilettos while holding a single red flower in her hand.