Christian Slater is engaged.

The 43-year-old actor - who divorced his first wife Ryan Haddon in 2007 - is set to tie the knot with his longtime girlfriend Brittany Lopez.

Speaking on 'Late Night With Jimmy Fallon', he shared details of how they first met in Florida, explaining: ''I went down to Miami a couple years ago, stayed at this little resort called Little Palm Island ... and this girl came walking along with another lady, a slightly older lady. I was sitting in my usual spot, eating my oatmeal that morning ... and this spot was famous for people proposing to each other ... and next thing I know she gets down on one knee and proposes to this older lady ...

''I thought I had just witnessed a nice lesbian engagement, so I was coming over to say congratulations, but it turns out it was her aunt and she was just trying to help her aunt capture the beauty and the romance of the moment. She was making a joke, and I witnessed it, and it intrigued me, and the next thing I know we were hanging out in the Everglades.''

Christian has children Jaden Christopher, 13 and Eliana Sophia, 11, from his first marriage.