The popular YouTuber took to social media to share that he has filmed a vid with the One Direction dude.
"Can you guess who my next video is with?" He wrote in a post accompanied with this no-so-subtle pic.
We'd recognise that head shape anywhere!
Not to mention Daddy Liam's ~iconic~ hand tatt.
There's no word as to when the vid will drop so keep those eager, Liam-loving eyes on Caspar's socials to be the first to know.