Zac Efron: Eighteen Pounds of Muscle for 'Lucky One'

Zac Efron runs some errands around town on Tuesday (January 11) in Los Angeles.

The 23-year-old actor recently shared with E! that he gained eighteen pounds for his role in the The Lucky One, a drama in which he stars as a veteran of the Iraq War.

Zac, who is going to present an award at the Golden Globes this weekend, went for a meeting with his agent at CAA on Monday (January 10).

FYI: Zac is wearing a limited edition Sportiqe Apparel Lakers Championship t-shirt.

10+ pictures inside of Zac Efron running errands…