'90210' Exclusive: Preview the Official Season 4 Trailer (Video)

The West Beverly gang celebrates the end of summer – and the beginning of the rest of their lives in the first official trailer for Season 4 of 90210.

Naomi (AnnaLynne McCord)starts off her college life in a big way – and apparent arrest. Liam looks ready to start the academic year as a married man, and Navid (Michael Steger) and Silver (Jessica Stroup) look positively glowing, at least until his kid sister (Fabiana Udenio) enters the picture.

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Meanwhile, Naomi and Justin Deeley’s Austin -- the new cowboy in town – get flirty.

Watch The Hollywood Reporter’s exclusive trailer for the new season of 90210.

Season 4 of 90210 premieres Tuesday, Sept. 13 at 8 p.m. on the CW.

Email: Lesley.Goldberg@thr.com; Twitter: @Snoodit

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