Inside "The Last Tycoon" Premiere

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Lily Collins is having a moment and it’s—wait for it—red-hot.

On Thursday, the actress and To the Bone star strolled out of a vintage car and walked into the premiere of The Last Tycoon, where she reminded us that red and pink are always a good idea. The 28-year-old turned to Reem Acra for a strapless, two-tone ruffled dress with a pleated bottom-half that she styled with pointed-toe red Jimmy Choo pumps and a side swept ‘do. She looked glamorous as she greeted friends like Matt Bomer and Lea Michele at the premiere.

Earlier this week, stars flocked to St. Tropez for The Leonardo DiCaprio Foundation’s Fourth annual gala, where yes, Leo made an appearance alongside his former Titanic co-star Kate Winslet and performers Lenny Kravitz and Madonna. Can we please get an invite next year, Leo?

Revolve held its final #RevolveintheHamptons party on Sunday and to end with a bang, they invited Olivia Culpo, Chanel Iman, Elsa Hosk, and Josephine Skriver. While people sipped oversize glasses of Moët Ice Imperial, Travis Scott took the stage and basically shut the whole thing down. Talk about another fabulous weekend well spent.

Scroll down to see the best parties of the week.

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Lily Collins and Lea Michele

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at the premiere of The Last Tycoon.

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Jessica Alba

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at Cuyana’s Essential Women series.

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Charlize Theron

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at the Atomic Blonde premiere.

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Sienna Miller

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at the Cat on a Hot Tin Roof after-party.

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Vanessa Bayer and Claire Danes

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at the Brigsby Bear premiere and after-party.

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Maxwell Osbourne

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at The Select House in Montauk.

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Chanel Iman, Elsa Hosk, and Josephine Skriver

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at the final #REVOLVEintheHamptons party with Moët & Chandon.

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Olivia Culpo

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at the final #REVOLVEintheHamptons party with Moët & Chandon.

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Travis Scott

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at the final #REVOLVEintheHamptons party with Moët & Chandon.

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Sophie Auster

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at Amazon's launch of The Fix.

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Leighton Meester

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at Sunglass Hut's #MadeForSummer gathering for Miami Swim Week.

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InStyle Editor-in-Chief Laura Brown and Nicky Zimmermann

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at Zimmermann's Miami store opening dinner.

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Leonardo DiCaprio and Madonna

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at The Leonardo DiCaprio Foundation's 4th annual Saint-Tropez Gala.

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Lenny Kravitz, Leonardo DiCaprio, and Madonna

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at The Leonardo DiCaprio Foundation's 4th annual Saint-Tropez Gala.

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Leonardo DiCaprio and Kate Winslet

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at The Leonardo DiCaprio Foundation's 4th annual Saint-Tropez Gala.

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Star-Studded: The Best Parties This Week