He is known for his role as Dennis "Asbo" Severs in the British television series The Smoke and Gary "Eggsy" Unwin in Kingsman: The Secret Service. He appeared in the British drama film Testament of Youth, as Edward Brittain. He also played Mad Teddy in the film Legend, starring Tom Hardy, and starred as Eddie "The Eagle" Edwards in the film Eddie the Eagle.
His first name is a variation of "Taran", which is Welsh for "thunder".
His father ran a bed-and-breakfast and his mother works in social services. He was first raised around the Wirral, England, but his family moved to the island of Anglesey, in Wales.
He then moved to Llanfairpwllgwyngyll, where he spent most of his childhood, and moved with his family to Aberystwyth, Wales, when he was twelve. Egerton considers himself Welsh "through and through", and speaks conversational Welsh.
He attended Ysgol Penglais comprehensive school.
Egerton is a RADA-trained actor who graduated with a Bachelor (Honours) Acting in 2012. He is a tenor through music and dance, specialising in stage combat, and his interests include literature and traveling Egerton made his acting debut in 2011 with a small role in two episodes of the Independent Television series Lewis as Liam Jay.
Later, he was added to the main cast of the Sky1 series The Smoke.
Egerton played Gary "Eggsy" Unwin, the protégé of Harry Hart (Colin Firth), in Matthew Vaughn"s film Kingsman: The Secret Service. Egerton co-starred in Testament of Youth, based on the life of Vera Brittain, which starred Alicia Vikander and Kit Harington as the leads and appeared in the two-part episode "The Ramblin" Boy" in the seventh series of Lewis as Liam Jay
He was named one of Gentlemen’s Quarterly"s 50 best-dressed British men in 2015 and in 2016.