The Royal Baby, Justin Theroux, Derek Hough & More Hot Celebrity Sightings For Tuesday, July 23, 2013

Kate Gives Birth!
Duchess Catherine gives birth to a healthy baby boy!
So many photos, so little time. We spotted tons of celebrites out and about and attending events.

The Duke of Cambridge, Prince William and Kate Middleton, Duchess of Cambridge leave St Mary’s Hospital after having a baby boy in London, England. The couple proudly showed off their new born to the waiting public.

Wanderlust actor Justin Theroux speeds through New York City, New York on his Ducati motorcycle. 

DWTS dancer Derek Hough stopping for a juice and a snack at the Earth Bar in West Hollywood, California.

Launch the gallery to check out all the pics, and find out who was where and when!