Knut, the most famous polar bear Germany, celebrated today at Berlin’s Zoo his first birthday.

By noon almost 2,000 people came to the Zoo on Wednesday to wish him a Happy Birthday, and people were still coming to his pen, in spite of the cold weather.

His birthday treat was a cake with fruit, fish, vegetables and rice on a bed of lettuce topped by a wooden candle. As soon as his keeper, Thomas Doerflein brought it, Knut came out of his cave to devour it, Timesonline reports.

A giant birthday cake was made for this occasion out of 300 eggs, 33 pounds each of flour and sugar, as well as 22 pounds of marzipan, USA Today informs. Slices were sold to the visitors and money would go to the foundation of the zoo.

Knut, along with his twin brother, was abandoned a year ago by his mother, Tosca. His brother died a couple of days later. It attracted media attention when his keeper started to camp out at the zoo to feed him with the bottle every two hours.

Activists expressed their anger saying that it will sue the zoo on grounds that it was interfering with nature not letting the cub by himself, although it could have cost him his life.

He has grown from a cuddly ball of fur of 2 pounds to an adolescent polar bear of 243 pounds. In July he was put on a diet.

His story generated 14 million in ticket sale at the zoo and Knut toys and book. He even appeared on the cover of Vanity Fair.

According to officials at the zoo, because he has grown so much they won’t be able to keep him any longer, and are looking for other zoos in Europe where he can also find him a mate.

Thomas Doerflein, who raised Knut by hand said in an interview: “A spacious enclosure. A female partner. At some point, Knut needs to leave me."