The 19-year-old is the second current Premier League ace to join the BT Sport line-up, following Gareth Bale, who also recently signed as a BT ambassador and will feature in the adverts.
Oxlade-Chamberlain, who has ten England caps, will appear as a regular guest on the channels, which will be based at the iCITY development at the Queen Elizabeth Park in Stratford.
“We are thrilled that Alex has agreed to sign up for BT Sport, “Simon Green, head of BT Sport said. Alex is emerging as an international star, having broken into the senior team aged just 18. His hard work and dedication to improvement has already taken him to great heights and serve as an inspiration to young football fans that if you are good enough, you are old enough.”
BT Sport will show 38 live Premier League games a season for three years starting in August 2013.
It has also secured the rights to live top tier matches from Series A in Italy, Ligue 1 in France, Brasileiro in Brazil and Major League Soccer in the USA and signed a deal with the Women’s Tennis Association to air up to 800 hours of live tennis.
In February the PMA reported BT’s intention to acquire ESPN’s TV channels business in the UK and Ireland, which will enable it to show live games for the FA Cup, Scottish Premier League, Europa League and the German Bundesliga.
In addition, BT Sport will air up to 69 live rugby union games a season from the Aviva Premiership.