Wolverhampton Wanderers striker Andy Keogh has put pen to paper on a two-and-a-half-year deal at Millwall.
The 25-year-old, who has spent loan stints at Cardiff City and Bristol City, believes that he can make an impact at the Championship club.
"Millwall are an ambitious club with passionate fans and I'm delighted to be joining them," Keogh told the club's official website.
"I'm sure I'll settle in quickly and hopefully can play my part in helping the team become successful.
"I'm now looking forward to moving down with my family, getting settled and start concentrating on my football again."
The frontman, who had not played in Mick McCarthy's first team since August 2010, is ineligible to make his debut for Millwall against Watford tonight.