Dylan Sprouse knows how to put the fun in Sunday Funday.

Over the weekend, The Suite Life on Deck star took to Instagram to share how he was enjoying a couple days off of work.

So what's a 26-year-old dude supposed to do? Have a costume party, obviously.

On Sunday evening, Dylan showed off his impressive abs while wearing what appears to be a mix of pajamas and a Halloween costume.

"Hey man, yah, sorry I couldn't chill today," he said in the video. "Sundays are really busy for me."

Dylan also captioned the video, "And I'm already in my pajamas…" LOL!