And boy, are we glad he did...
And he's looking a whole world away from his vampish on-screen persona.
Also featuring in the campaign is actor Mechad Brooks (left), who starred in hit series True Blood, alongside Spanish tennis star Fernando Verdasco (centre), and Japanese footballer Hidetoshi Nakata (right).
But not only do we have these hot shots to feast our eyes on, the new X campaign promises to be Calvin Klein's most digital to date.
That means we'll also be treated to behind-the-scenes videos and interviews with the four leading lads, as well as innovative 3D-effect versions of the adverts.
'We're thinking bold, graphic and provocative, as always,' says Bob Mazzoli, chief creative officer for Calvin Klein Underwear.
Kellan Lutz in 3D? Now that's something we'd quite like to experience...
The full digital campaign is set for release on 1 March, so watch this space!
What do you think of Kellan Lutz as the new face and body of Calvin Klein Underwear? Let us know your thoughts in the comments box below!