Asked about the recent rumblings that DiCaprio may finally settle down with longtime girlfriend Bar Refaeli – despite some occasional bumps in their relationship and his rep's denial the duo became engaged – Mortimer, 38, let out a laugh and said, "I didn't know he wasn't married! I'm sure that he will, yes, and be very happy."
While Mortimer – red-carpet ready in a sleek, black Oscar de la Renta dress at Wednesday's Manhattan premiere of her movie only one month after giving birth to May Rose Nivola, her second child with actor-husband Alessandro Nivola – didn't dish about DiCaprio and his main squeeze, the actor's longtime friend, Roberta Armani (niece of Giorgio Armani, whose company sponsored the Ziegfeld Theatre event), told reporters that the pair are well-suited for each other.
"They are very similar," said Armani. "Not only do they look alike, they are both very lively and warm. No pretenses at all."
Mick Jagger Chimes InFor his part, DiCaprio told reporters that he is in love – with working with Scorsese, that is.
"After doing four films with him now, what I've really discovered about the way Marty works is the fact that he really gives actors ownership of their characters and almost finds the emotional narrative through the actors that he hires," DiCaprio told TV station NY1's George Whipple on the red carpet. "That's so empowering and it makes you trust yourself as an actor and go places that you maybe, normally wouldn't."
Also joining DiCaprio at the star-studded premiere were director Scorsese, Shutter Island author Dennis Lehane and DiCaprio's costars Michelle Williams, Mark Ruffalo, Sir Ben Kingsley and Patricia Clarkson – as well as Mick Jagger.
Asked what he was doing there, the Rolling Stone said, "It's fun! I wanted to see the movie!"
With reporting by KAREN WERLING