Rose and Jack may not have lived happily ever after, but Kate Winslet and Leonardo DiCaprio have proven their friendship can survive all the elements, including icebergs. The Titanic costars recently reunited in Saint Tropez when Winslet, 41, supported her longtime friend and co-star, 42, at a gala for Leo’s environmental foundation back in July. The pair not only posed for photos at the event in the South of France, but they took some time to catch up poolside at Leo’s luxurious French estate.