Kaley Cuoco and Johnny Galecki are enjoying their best friend night outs and even shared their funny antics together in a hilarious "biting" photo on social media.

Galecki took to Instagram over the weekend to upload a fun and flirty photo of him biting his "The Big Bang Theory" co-star Cuoco, E!News reported. In the picture, Galecki took a big bite of Cuoco’s right shoulder while the actress had her mouth open in what appeared to be a scream. The actor captioned the photo, "Hilarious night out in the LA Arts District w/ @normancook #BFFsbite @ludwig1965 @bricuoco."

Both Galecki and Cuoco, along with the actress’ sister Bri, were enjoying a night out in downtown Los Angeles, where they attended Bethesda’s video game launch for Fallout 4. An E! insider shared that while the two "The Big Bang Theory" stars had a good time during the launch party, there was "no PDA between them." 

The E! source added, "They were just drinking and dancing with friends, and having a good time. They seemed to especially get excited when Bloc Party went on stage to play. They mingled with fellow stars like Chrissy Teigen, Kellan Lutz and Brittany Snow before calling it a night around midnight."

Apart from Galecki’s biting picture, Cuoco also uploaded a group shot of their Fallout 4 launch party adventure, Entertaintment Tonight reported. Cuoco’s picture showed her sister, Bri, sandwiched between her and Galecki. The newly single actress captioned the Instagram picture, "So fun tonight! #fallout4party @bricuoco @sanctionedjohnnygalecki."

Meanwhile, fans hoping for Galecki and Cuoco to get back together again would be disappointed since the two already slammed dating rumors last month. Rumors of Galecki being one of the reasons behind Cuoco and former husband’s Ryan Sweeting separation, soon surfaced after the actress filed for divorce in September. The two stars, who previously dated for two years before splitting up in 2010, each took to Instagram to share that they’re the best of friends and that they didn’t have "secret flings" with each other.

In Cuoco’s October Instagram post, she wrote, "So sorry to disappoint, but no home wreckers or secret flings going on here. Me and @sanctionedjohnnygalecki are just the best of buds- Leonard and Penny will just have to suffice!!!"