Brian Austin Green is joining the cast of Charlie Sheen's U.S. sitcom "Anger Management," production company Lionsgate confirmed.

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The former "Beverly Hills, 90210" star will play Sean, Sheen's character's nemesis and the boyfriend of his ex-wife Jen, played by Shawnee Smith, E! News reported.

Green made his first appearance on the series last season, but will now be a full-time member of the ensemble.