The No.21 took his maiden training session as a Red shortly after entering the club's West Derby complex at just before 10.30am.
Afterwards, Oxlade-Chamberlain completed a selection of media duties, including his first interview as a Liverpool player with Liverpoolfc.com, which you'll be able to read on this website or watch via LFCTV or LFCTV GO later this evening.
We'll also bring you behind-the-scenes footage from the 24-year-old's first day at Melwood in an exclusive clip which you'll be able to watch online on Thursday. In the meantime, browse our gallery of Oxlade-Chamberlain's day below.
Exclusive LFC copyright images. Do not share or republish without authorisation.
Photos by Andrew Powell.