Kelsey Grammer (Monsters University) has joined the cast of Transformers 4! He will play the villain Harold Attinger.

Attinger is a counter-intelligence Op, though not much else is known about the character. He is a human, though, and not an alien robot of any kind.

Grammer joins Mark Wahlberg (who just starred in Bay's Pain and Gain), Stanley Tucci, Nicola Peltz and Jack Reynor in the cast.

Michael Bay returns to direct the fourth film, which is intended to launch a new trilogy. It has a release date set for June 27, 2014.