Popular YouTube star with multiple channels titled jccaylen, lifewithjc, and theseDudez. He was a member of the Our2ndLife channel until they split up in December 2014. He and Kian Lawley then teamed up to form the collaborative channel KianAndJc. He'd later star in Party Boat in 2017 and produce YouTube's The Reality House in 2019.
He first joined YouTube in September of 2010 with the YouTube channel lifewithjc.
His dog Wishbone is frequently featured in Our2ndLife videos. In 2015, he spent seven days on the road and he documented the experience on YouTube. He is a member of the C4 House content collective.
His parents divorced when he was very young. He has two sisters named Jaylyn and Ava Grace and a brother named Joe Felix. His birth name is Justin Caylen Castillo but he had it legally changed to Justin Cloud Caylen. He dated Chelsey Amaro in early 2018.
He briefly dated fellow YouTube sensation Lia Marie Johnson after they were both signed by AwesomenessTV.