It's been 20 years since Rose abandoned her evil fiancé and then let her one true love, Jack, die (SORRY IT'S TRUE), but now the trio are back together and partying for a good cause!

Billy Zane and Kate Winslet attended a charity fundraiser for Leonardo DiCaprio Foundation's gala in St. Tropez, France, and they're all looking as dewy as the day the ship went down.

Billy posted the photo to Instagram with the caption, "Gangs back together. Now we're saving icebergs. Go figure. @katewinsletofficial @leonardodicaprio @leonardodicapriofdn."

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This is the same gala where a dinner with Kate and Leo was auctioned off to one lucky rich person.

The gala, which raised money for Leo's favorite environmental causes, was also attended by Madonna and Lenny Kravitz, who graciously performed for guests. Behold Madge breaking it down:

Also in attendance were Cate Blanchett, Emma Stone, Marion Cotillard, Tom Hanks, Jared Leto, Penélope Cruz, Kate Hudson, Tobey Maguire and Uma Thurman. Not too shabby!

preview for A Timeline of Leo & Kate Being Adorable on Red Carpets

From: Cosmopolitan US