Kate Winslet, 15 Years Post-Titanic: Leonardo DiCaprio's "Fatter," I'm "Thinner"

Kate Winslet attends the world premiere of 'Titanic 3D' at Royal Albert Hall on March 27, 2012 and Actor Leonardo DiCaprio arrives at the 69th Annual Golden Globe Awards held at the Beverly Hilton Hotel on January 15, 2012 Credit: Mike Marsland/WireImage.com; Jason Merritt/Getty Images

Take that, Leo!

Kate Winslet may have once been teased for being chubby, but these days, the former Titanic actress, 36, is the one dishing out weight-related zingers.

In a new interview with iTV's Daybreak, Winslet -- promoting the 3-D release of 1997's Titanic -- remarked on how much she and her costar, Leonardo DiCaprio, now 37, have changed since portraying Jack and Rose in the mega-smash film.

"We do look very different, we're older," Winslet reasoned. "Leo's 37, I'm 36 -- we were 21 and 22 when we made that film. You know, he's fatter now -- I'm thinner."

Though she believes she aged better than DiCaprio -- whom she also worked with on the Oscar-nominated Revolutionary Road -- Winslet just can't get used to the fact that Titanic has been released in 3-D.

"I was literally like, 'Oh my God, make it stop! Is that me? Oh my God, that's me. Block my ears, somebody!" Winslet recently said after viewing 17 minutes of the 3-D footage. "'Somebody club out my senses. Make it f-cking stop!'"