Will Ferrell Practices His Royal Bow, Does Harry Caray at the Royal Wedding (VIDEO)

Even though he's not going to be in attendance at the Royal Wedding, Will Ferrell still dressed up in his fineries for his appearance on 'Late Show with David Letterman' (Weeknights, 11:35PM ET on CBS). Coincidentally, Matt Lauer was dressed almost identically for his 'Late Night' appearance tonight.

Ferrell proceeded to offer his practiced greeting to the royal couple to Letterman's audience. All was going well, though his curtsy was a little wobbly, until Ferrell decided to approach the camera and lay a big, wet kiss on it.

A bit later, he gave us an idea of what it would have been like if Harry Caray were still alive to commentate on the proceedings. While it doesn't work as well without the giant glasses, it's always a treat to hear Ferrell's hilarious Caray impression. We can only imagine how much entertainment value Caray, or even Ferrell, could add to the event this Friday.