Credit: Lester Cohen/WireImage.com

Guess Megan Fox hasn't replaced her lost engagement ring yet.  She showed up wearing an enormous black ring on her right hand at Thursday's premiere of Jonah Hex in Hollywood. (The new Us Weekly, out now, reports that Fox lost the 2-carat ring on a Hawaiian beach just hours after Brian Austin Green's proposal.

 

Even without a new diamond to show off, Fox, 24, gushed to UsMagazine.com about her wedding -- even if it's still a long ways off.

"It's going to be years!" she told Us of her walk down the aisle. "I'm going to be 44 when I get married!"

Whenever the big day happens, Green, 36, will be a hands-on groom, Fox said. "He is in on the planning. He wants to be!"

The star also clarified to reporters that their latest news is "really not a re-engagement... nothing is different."

The couple began dating in 2004 but called off their previous two-year engagement in February 2009.

"We are just even more committed to each other and we always have been," Fox cooed Thursday. "I am more in love with him now than I was in the beginning."