Zac Efron Gets 'Super Flirty' at SXSW
03/20/2013 AT 09:25 AM EDT
"He was hitting on a girl and being super charming," the insider tells PEOPLE. "He took photos with some female fans, but asked them to do it on the down low because he didn't want to bring too much attention to himself."
Enjoying Strongbow cider, the actor, who arrived solo, appeared to be "having a good time and talking to people," the source says.
Efron was dressed very casual, in a grey beanie and grey and black, long-sleeved T-shirt.
– Dahvi Shira