Chelsea have signed Wigan forward
for an undisclosed fee thought to be around £9m.
The Champions League winners had four previous bids for the former England Under-21 international rejected.
A statement on Chelsea's official website read: "Chelsea Football Club is delighted to announce the signing of Victor Moses from Wigan Athletic."
Crystal Palace, Wigan
Nigerian (three caps)
Did you know?
Moses played for England at Under-16, U17, U19 and U21 level before pledging his allegiance to Nigeria.
No details were given on the contract for Moses, who played
in the Blues' 2-0 victory
at the DW Stadium on Sunday.
Chelsea are believed to have offered £7m up front, with a further £2m in add-ons.
joined Wigan from Crystal Palace
on a three-and-a-half-year deal in January 2010 for a reported fee of £2.5m.
He scored six goals for the Latics last season, playing a key part in their successful bid to stay in the Premier League.
Wigan manager Roberto Martinez was
keen to keep the Nigeria international at the DW Stadium,
but knew that Wigan were likely to accept a bid for the player if another club met their asking price.
Moses becomes Chelsea boss Roberto Di Matteo's second signing of the day, following
the capture of Marseille full-back Cesar Azpilicueta.