Star Keough, who plays Daisy Jones, looked like a movie star in a black Schiaparelli outfit, complete with black opera gloves. She finished the look with statement green Schiaparelli earrings.

Camila Morrone plays Camila Dunne, Billy's wife, in Daisy Jones. For the red carpet, Morrone also opted for an all-black ensemble with a sheer cape.

Suki Waterhouse, who plays the Six's keyboardist Karen, dazzled in a plunging sheer green dress designed by Stéphane Rolland Couture.

Claflin, who plays Billy, kept it simple in a maroon suit.

Be, who plays Daisy's friend Simone, looked sparkly in a PatBo dress.

Whitehouse wore a Wales Bonner jacket. The actor plays Eddie, the Six's bassist.

Wright, who plays record producer Teddy Price, kept it simple in a gray blazer.

The Six's drummer, Warren, is played by Chacon—who embraced rock'n'roll energy on the red carpet.

The women of Daisy Jones posed for a photo together—Keough's green earrings complemented Waterhouse's green gown perfectly.

The two leads posed for a photo together. "In truth, I couldn't have asked for a better teammate," Claflin said of Keough. "As much as she had that reputation in her family genes, she didn't come with much musical experience herself, so the two of us had each other to lean on in that way."

Harris plays a character written for the show, Bernie. She looked cool in aviator sunglasses on the carpet.

Olyphant looked suave in an all-black suit. He plays Rod, the Six's manager.

Here's a look at the entire Daisy Jones & the Six band—missing Will Harrison, who plays Graham Dunne.

And here's the full main cast of Daisy Jones, L-R: Sebastian Chacon, Josh Whitehouse, Camila Morrone, Riley Keough, Sam Claflin, Suki Waterhouse, Nabiyah Be, Timothy Olyphant, and Tom Wright

Witherspoon walked the red carpet, wearing Schiaprelli and Reza jewelry. Her production company, Hello Sunshine, produced Daisy Jones & the Six, and Witherspoon served as an executive producer.

"She utterly transformed for this role," Witherspoon said about Keough's performance as Diasy. "It was amazing. In real life, I mean, I need to set this distinction — she's very quiet. She's a very quiet, reserved person."

Keough was supported by her husband, Ben Smith-Petersen. He even has a very small cameo in episode two of Daisy Jones.

Reese gushed to Waterhouse during the premiere.

Author Taylor Jenkins Reid was also in attendance, pictured here with her husband Alex Jenkins Reid.

Stewart, who directed four episodes, shimmered in a purple jumpsuit.

Marcus Mumford—yes, that Mumford of Mumford & Sons—was in attendance because he helped write songs for the show.

Country singer Maren Morris, too, helped with the music. She wore an Off White dress to the premiere.

Mills served as the lead producer and songwriter for Daisy Jones & the Six. He said, "I am grateful that, among other things, it afforded me an opportunity to collaborate with so many of my peers, and also some of my heroes." (Read more about the soundtrack here.)