BFFs? Justin Bieber and Ruby Rose Compare Arm Tattoos Over a Cozy Dinner

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Justin Bieber and Ruby Rose's friendship is turning out to be a lasting one.

Following their meet-up last month in Las Vegas after the pair of lookalikes struck up a Twitter friendship, the 29-year-old Orange Is the New Black star Instagrammed pics of the two looking super-chummy over dinner on Monday. They hit up trendy sushi restaurant Katsuya in Hollywood, California.

In one picture, Justin admires Ruby's tattoos and holds her hand to get a closer look.

WATCH: Seeing Double? Celebs Who Have the Same Tattoos

In another snap, Ruby and her pal Johnny Shahidi -- CEO of the app Shots -- pose with a long-haired Justin, with the Australian actress joking, "@johnny me and .. I dunno some up and coming artist .."

Aside from their striking resemblance to one another, Ruby and Justin also have mutual friends, judging by this picture of Ruby posing with controversial boxer Floyd Mayweather. "The champ!" she Instagrammed last week.

Not surprising given Mayweather's multiple domestic battery charges, some fans didn't take too kindly to the picture. "How does it feel taking a selfie with a woman beater? @rubyrose," one user wrote.

WATCH: Justin Bieber Boxes With Floyd Mayweather

Check out the video below for more on Justin and Ruby's Vegas meet-up.