Credit: FameFlynet

Rock on!

Maddox Jolie-Pitt had quite the shopping spree with dad Brad Pitt Wednesday when the 10-year-old and his famous father hit up a Hollywood Guitar Center store to snag new music equipment.

Dressed entirely in black, papa Pitt, 48, went relatively incognito for the afternoon outing with his and Angelina Jolie's oldest boy.

"He spent time with his son looking at various guitars and the kid seemed genuinely interested," an eyewitness tells Us Weekly of the duo's day out.

Leaving the shop with a guitar and amplifier, Pitt and Maddox "were like a regular father and son," said the source. "Maddox was a fun kid who looked like a little rock dude."

Pitt's outing with Maddox capped off a fun-filled week in the Jolie-Pitt household. On Sunday, Pitt attended the 84th annual Academy Awards with an Atelier Versace-clad Jolie on his arm. Up for Best Actor honors for his work in Moneyball, Pitt lost out on a trophy this year to The Artist's Jean Dujardin.