Even though he's not officially attending the Royal Wedding, Will Ferrell still dressed up in his best morning suit and top hat for his appearance on 'Late Show with David Letterman.' The funnyman and current 'Office' guest star even threw in a Harry Caray impression to the audience's delight.

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.