Back of Happy Fourth Birthday, Knut the Cute! We've admired him as a baby, sympathized when his beloved caretaker passed away and giggled when he found love . . . and now he's four! View 8 Photos › Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 The famed polar bear named Knut got a bunch of special snacks including something baked into his big number. See him enjoy his birthday on Dec. 5 and click through the gallery. View 8 Photos › Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 Photo 7 Photo 8 Image Source: Getty Comments Angelica-Marden 6 years I'm nutty for Knut.