17 June 2015 Last updated at 17:40 BST
He's replacing Jeremy Clarkson, who was sacked from the show earlier this year, after punching a member of staff who works on the programme.
It's yet to be announced who will join Evans on the show.
On Wednesday morning, he told his radio listeners why he took the job.
TV and radio presenter Chris Evans has been talking about becoming the new presenter of Top Gear.