The BBC Radio 2 and One Show presenter and motoring enthusiast had been hotly-tipped to replace Jeremy Clarkson following Clarkson's sacking by the BBC in March.
Initially, Evans had played down the speculation, telling listeners to his morning radio show: “Not only is it not true, it’s absolute nonsense”, adding that it was “never going to happen”.
However, a BBC statement confirmed that Evans, who had Clarkson as a guest on a recent special 20th anniversary edition of TFI Friday on Channel 4, would indeed be taking the helm with filming starting in the next few weeks.
Evans said: "I’m thrilled, Top Gear is my favourite programme of all time. Created by a host of brilliant minds who love cars and understand how to make the massively complicated come across as fun, devil-may-care and effortless.
"When in fact of course, it's anything but and that's the genius of Top Gear's global success.
"I promise I will do everything I possibly can to respect what has gone on before and take the show forward," he added.
Following the confirmation, Evans tweeted to assure fans that his BBC Radio 2 slot is not in jeopardy, and to praise former presenters Clarkson, Richard Hammond and James May.
First tweet as new Top Gear host. I would like to say Jeremy, Richard & James are the greatest. And NO I'm not leaving the R2 Breakfast Show— Chris Evans (@achrisevans) June 16, 2015
Kim Shillinglaw, controller of BBC Two, said Evans is the "perfect choice" to take the show forward, citing Evans' "well-known" knowledge and passion for cars, and his "sheer inventiveness and cheeky unpredictability".
It is unknown who will join Evans in the all-new line-up.
However, the announcement comes after DIY Sos presenter Nick Knowles revealed that he has been in talks with the BBC about joining the team.
Knowles told the Radio Times: "I'm a BBC regular and I've had conversations with people at the corporation about it
"But with all the work I've got on it's not something I can do at the moment.
"Getting the new team right is very important. And no, I won't speculate on who will get it!" he said.
Earlier this year, Great British Bake Off presenter Sue Perkins was forced to quit Twitter after she was targeted by trolls amid rumours she would join the Top Gear presenting team.
Chris Evans: Career in pictures
Chris Evans: Career in pictures
1/15 Chris Evans
Chris Evans in a studio, 1980s
2/15 Chris Evans
(L-R) Gaby Roslin, Chris Evans, Paula Yates and Mark Lamarr on Big Breakfast TV Show, 1992
3/15 Chris Evans
Chris Evans on the day of his 30th birthday, in London, 1996
4/15 Chris Evans
Chris Evans in 1997
5/15 Chris Evans
Chris Evans of England wears a policeman's hat having fun with Mark O'Meara captain of the USA team on the range before the fourball matches on the first day of All-Star Cup on the Roman Road Course at The Celtic Manor Resor in Newport, 2005
6/15 Chris Evans
Chris Evans and Ronan Keating arrive at the Gala Dinner on the first day of the Northern Rock All Star Cup at the Celtic Manor Resort in Newport, 2006
7/15 Chris Evans
Chris Evans poses in the awards room with the Music Radio Personality of the Year Award at the Sony Radio Academy Awards 2007 at Grosvenor House Hotel in London
8/15 Chris Evans
Chris Evans presents during 'Thank You For The Music - A Celebration Of The Music Of Abba' at Hyde Park in London, 2009
9/15 Chris Evans
Radio 2 DJ Chris Evans and David Cameron appear on the Andrew Marr show on BBC TV in London, 2010
10/15 Chris Evans
Chris Evans and Moira Stuart during Chris Evans' first day as the host of the Breakfast show, the position he took over from Sir Terry Wogan, 2011
Mark Allan/BBC/PA Wire
11/15 Chris Evans
Chris Evans interviews Luke Darlington (L) Prince Harry and JJ Chalmersfor his breakfast show at BBC Radio 2 Studios in London, 2014
12/15 Chris Evans
Radio 2 DJ Chris Evans attends the F1 Grand Prix of Monaco, 2015
13/15 Chris Evans
Chris Evans with Jeremy Clarkson outside BBC Radio 2 Studios, 2015
14/15 Chris Evans
Chris Evans meets Camilla, Duchess of Cornwall, following the launch of BBC Radios 2's '500 Words', a children's story writing competition which is supported by the duchess, in the Morning Room at Clarence House in London, 2015
15/15 Chris Evans
Chris Evans at the celebrity start at The London Marathon 2015 in London
Former X Factor presenter Dermot O'Leary, and model Jodie Kidd are also household names rumoured to be in the running.
Fans of Clarkson, Richard Hammond and James May will get one last chance to see them in action on the show when they drive off later this month in a farewell appearance screened on BBC2.
The previously unseen footage, which was put on hold after Clarkson hit the headlines for "a fracas" with producer Oisin Tymon, will feature in a one-off 75 minute show on Sunday June 28.
Viewers will see Clarkson, Hammond and May behind the wheel of classic cars and beaten-up 4x4s in their final challenges as a trio.Reuse content