Cat Deeley arrived at Elle Magazine's "Women in Television Celebration" in West Hollywood this week looking sweet in a simple, one-shouldered lavender gown.

Cat Deeley will be hosting "Royally Mad" on BBC America in April, a two-part special leading up to the marriage of England's Prince William and Kate Middleton.

"Royally Mad" features Deeley as a spirited tour guide taking four of America’s most enthusiastic Royal Wedding fanatics on a trip of a lifetime to London, where they will have a chance to indulge in everything Royal Wedding-themed and will ultimately experience their own fairytale ending.

Deeley is the host of the reality show "So You Think You Can Dance."

See more photos of Cat here!