The 20-year-old midfielder becomes Megson's first signing of the summer after he agreed a four-year contract at the Reebok Stadium.

The England Under-21 international will cost an initial fee of £5million with an additional £750,000 as add-ons.

Megson said: "Fabrice is a tough-tackling central midfielder who has had a good grounding with the Arsenal youth set-up.

"He's played in the Premier League with Birmingham and he'll be a tremendous asset to Bolton over the coming seasons."

Muamba came up through the Arsenal youth system before initially joining Birmingham on a season-long loan deal at the beginning of the 2006-07 season.

He made 34 appearances for the Blues before making his stay at St Andrews permanent.

He made his England Under-21 debut in the friendly match against Romania in August 2007 and has since gone on to make a further six appearances at that level.