Thor actor Chris Hemsworth wielded a toothbrush, not a hammer, for his first job.

The Avengers: Endgame star said on The Tonight Show Wednesday that he cleaned breast pumps as a 14-year-old.

That admission ultimately drew serious doubt from host Jimmy Fallon and fellow guest Kumail Nanjiani, whose job it was to determine whether Hemsworth was lying in a game of True Confessions.

Turns out Hemsworth, who now stars in Men In Black : International, was telling the truth.

Watch above to hear how Hemsworth scrubbed away the dried milk and other details.