Michael Böllner (born September 14, 1958) is a German former child actor known for playing Augustus Gloop in the 1971 film Willy Wonka & the Chocolate Factory.

[5] After Willy Wonka was completed, Böllner had a few minor roles on German television, but his father decided that education should be a priority.

[10] With Willy Wonka being rarely shown in Germany, Böllner was unaware of the cultural impact the film had until the mid-1990s, when the cast reconnected for the first time.

[12] Following the 2016 death of co-star Gene Wilder, who played Willy Wonka, Böllner expressed regret that he had not talked with him more as an adult after his English improved.

[13][14] In 2023, after publishers removed the term "fat" to describe Augustus Gloop in the Roald Dahl Charlie and the Chocolate Factory book on which Willy Wonka was based, Böllner publicly defended the original text and called the change unnecessary.