Malky Mackay's side will be the top flight's second Welsh team next season, having only needed a draw against Charlton on Tuesday to complete its goal.Cardiff City has guaranteed its promotion to the Premier League after a 0-0 draw with Charlton.
Malky MacKay's side has enjoyed a hugely successful campaign, winning 25 times this season thus far, and a solitary point at home to Charlton was enough to seal promotion from the League Championship. The Bluebirds will play in the English top flight for the first time since 1962 and will mean Wales has two representatives in the Premier League next season, with Cardiff joining Swansea.
Cardiff has been top of the Championship table since November, and the club's promotion comes exactly 50 years to the day that the club was last promoted to the top league of English football.
A sellout crowd at the Cardiff City Stadium watched its side clinch the point it needed, and there were jubilant scenes at the final whistle.
Speaking after the game, Cardiff defender Mark Hudson told BBC 5 Live Sport:"I am lost for words right now. We thoroughly deserve that if I'm honest.
"The consistency we've had this year, top since November, and now we're promoted. We'll celebrate now then go for that title."