MALIBU — On June 21, a man accused of stalking two young celebrity sisters, Aly and A.J. Michalka, has pleaded not guilty to stalking the pop rock stars.

Caesar Branley, 25, was arrested for allegedly stalking the home of the famed singing and acting duo in Calabasas. He was arrested on June 17, at around 3 a.m. after allegedly being found trespassing near the gated community at the sisters’ residence, according to the sheriff’s Malibu/Lost Hills Station.

The sisters reportedly have a restraining order against the defendant, who was booked for misdemeanor violation of the order as well as for felony stalking.  Brantley, who has pleaded not guilty to the charges, is set to return to court on June 30.

Alyson Renae “Aly” Michalka and Amanda Joy “AJ” Michalka, now a pop rock band called “78violet,” are known for popular songs like “Chemicals React,” “Potential Break Up Song,” “On the Ride,” “Rush,” “No One,” and “Never Far Behind.”  Aly also had played a starring role with actor and musician Ricky Ullman in the Disney Channel Original Series, “Phil of the Future.”