She told People magazine: “He’s a solid, loyal person. He’s a great friend, he always has been, and not just to me, but to everyone around him. He still has friends he had when we made Titanic. In many ways he hasn’t changed a bit, but in other ways he absolutely has changed.
“He’s a stronger actor in this moment than he’s ever been. I think he’s more handsome than he’s ever been. And he feels, to me, the most settled he’s ever felt, in himself, right now, which is quite strange, really, given that there’s a lot happening around him. He’s quite centered and calm, and that’s different to the way he was 20 years ago.”
Meanwhile, the 40-year-old actress – who also starred alongside Leonardo in 2008’s Revolutionary Road – previously revealed the Revenant star would have never wanted to share a birthday party with his pal despite their long-running friendship.
She said: “He wouldn’t have a joint party with me, he really wouldn’t. Definitely not. He likes to have his moments … but also I don’t think I’d want to have a joint party with him, more to the (expletive) point!”