According to Jeorge Bird, Arsenal youth blogger, The Gunners have signed Aston Villa youth midfielder and England U17 international Dan Crowley:

Dan Crowley has completed his move to Arsenal but unsure if there'll be an official announcement as he's just 15. — Jeorge Bird (@jeorgebird) June 1, 2013

Here's what Bird had to say about the player:

The midfielder has consistently caught the eye at international level and was the scourge of Arsenal U18s as Villa ran out 6-1 winners in the Academy League late last season. He will add to the club’s collection of promising central-midfielders, joining Kristoffer Olsson, Jon Toral, Gedion Zelalem and Jack Jebb.

Talksport added their own assessment:

A true midfielder schemer, in every sense of the word, Crowley has shown an ability to unlock defences with an inventive brain to compliment his talented feet. Undoubtedly his greatest attribute appears to be his passing, with the 15-year-old appearing most comfortable playing in an advanced position - something he has excelled in for England.

The 15-year old, then, sounds like another potential talent in the number 10 role for Arsenal. He is clearly very young still and will need some time to develop. Unless he's some once-in-a-generation player, we shouldn't expect to see him in any senior team action for probably two years or so. In the meantime, have a peek at this video from the FA, and see what you think!