Glenn Howerton

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'AP Bio' Star Glenn Howerton Spills on the New Season

'AP Bio' Star Glenn Howerton Spills on the New Season

The actor chatted with ET Live about season two of 'AP Bio' and working on 'It's Always Sunny in Philadelphia.'

Glenn Howerton Gets 'Hangry' in 'A.P. Bio' Sneak Peek (Exclusive)

Glenn Howerton Gets 'Hangry' in 'A.P. Bio' Sneak Peek (Exclusive)

ET exclusively debuts a first look from Thursday's episode.

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