Supernatural's Misha Collins showed off a picture of his character -- Castiel -- wearing a pink prom gown on the set of the long-running CW series.

In the first photo, Collins wrote, "It was a rough day at the office." The photo itself shows the actor in a pink ball gown next to his co-stars, who are wearing lederhosen. The second photo sees Collins being embraced from behind, with the joking caption, "Good news, guys! I got a date for the prom!" Finally, he posted a video that shows just how he moves in the dress.

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Season 15 opened with the Winchesters and Castiel attempting to contain evil souls unleashed from Hell by God as a new potential apocalypse reared its head. After fourteen seasons of saving the world from all manner of paranormal foes, Sam and Dean's old enemies may be back with an axe to grind. Season 15 will be the final installment of the long-running series, which premiered in 2005. Castiel joined the show in Season 4 and has remained a mainstay ever since.

Airing Thursdays at 8 p.m. ET/PT on The CW, the final season of Supernatural stars Jensen Ackles, Jared Padalecki, Misha Collins and Alexander Calvert.

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