Leonardo DiCaprio, Kate Winslet Have a 'Titanic' Reunion With Billy Zane

Titanic's three biggest stars reunited on Wednesday all in the name of charity. Leonardo DiCaprio, Kate Winslet and Billy Zane were all on hand at the annual fundraising dinner for DiCaprio's foundation and took a picture to mark the occasion.

Zane shared the photo on Twitter with an irony-filled caption about icebergs, as a reference to their Titanic roles.

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He wrote, "Gang's back together. Now we're saving icebergs. Go figure.."

The photo-op wasn't the only reason the castmates reunited at the benefit, which was held in St. Tropez, France.

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The former on-screen lovers are auctioning off a dinner with themselves. One high-bidding fan will be able to go out to a New York City restaurant with the duo.

The proceeds from the auction are going to causes of Winslet's choosing: a young mother battling cancer and the autism charity the Golden Hat Foundation.

In addition to the Titanic trio, a long list of stars were scheduled to appear at the gala: Madonna, Cate Blanchett, Emma Stone, Marion Cotillard, Tom Hanks, Jared Leto, Penelope Cruz, Kate Hudson, Tobey Maguire and Uma Thurman. Lenny Kravitz was also set to perform at the event.