London: Jolyon Palmer, the first Briton to win the GP2 Series since Lewis Hamilton, celebrated his 24th birthday on Tuesday by agreeing to become the Lotus Formula One team`s third driver this season.
Lotus said in a statement that he would attend all grands prix and F1 tests in 2015 and would drive in a "significant number of free practice sessions as well as contributing to the car`s testing and development".
Palmer won the 2014 GP2 title with the most amount of points scored in a season (276) and the most consecutive points finishes (19).
Lotus`s two drivers, Romain Grosjean and Pastor Maldonado, are also former GP2 champions.
"I`m delighted to be moving into F1 with Lotus this year as third driver and I`m very grateful for the opportunity they have given me," said Palmer.
"Lotus is a great opportunity for me particularly with Mercedes engines now."
Palmer`s fellow countryman Hamilton, the 2006 GP2 champion, won the F1 world title last season for the second time.