Zac Efronappears naked in the adult-rated trailer for his new movie That Awkward Moment.
The former High School Musical star, who [uuid=d8255637-319c-46a8-a5a2-b543d440f3e6]has been in rehab this year[/uuid], is seen naked and "planking" while talking to a pal on the phone in the red band trailer.

The film stars Zac, Michael B. Jordan and Miles Teller as three young bachelors enjoying the single life in New York City - before women complicate things for them.
The comedy-drama also stars Jessica Lucas and Imogen Poots - and is written and directed by Tom Gormican.
It will be released in the UK on 7 February, 2014.