Seo In Young ran into T-ara's Jiyeon backstage at this week's 'M! Countdown'. She posted a photo of the former 'Heroes' co-stars together onto her Instagram along with the caption, "With the gluttonous dinosaur."

SEE ALSO: T-ara kick off their exciting return with MVs for 'Number 9' & 'I Know the Feeling'

In the picture, Seo In Young has a blonde braid she is holding up, while Jiyeon holds up loose strands of her hair.�T-ara made their comeback with "Number 9", and Seo In Young is grabbing a lot of positive attention for her latest song "Love Me".

Check out their performances as well as many other comebacks, such as SHINee and Nine Muses, on 'M! Countdown' here!�