His first and most famous film role was playing Augustus Gloop in Tim Burton's Charlie and the Chocolate Factory.
Wiegratz returned for several callbacks and eventually received the part, which marked his English-language film debut and also required him to wear a fatsuit.
[1] He performed his own stunts in the scenes of Augustus falling into the river in Wonka's Chocolate Room.
In 2006, Wiegratz starred in the eponymous film version of Cornelia Funke's Wild Chicks[1] as a member of an all-boys group called the Pygmies, and returned for a sequel the following year.
Both pictures were commercial successes, and he and several co-stars were guests on the German children's television program Ki.Ka Live on 2 April 2007.