Walker was on set for filming 'Percy Jackson and the Olympians'. The actors got a little break so they were all hanging out and talking amongst themselves.

Walker was with Leah Sava Jeffries and Aryan Simhadri, they were all laughing then Walker got up to go the bathroom and left his phone there.

When Walker returned, they were trying not to laugh.

"So who's that on your lockscreen?"

Leah asked teasingly.