The former Arsenal youngster was a free agent after leaving FC Pune City.
Wigan Athletic won the FA Cup two seasons ago, defeating Manchester City in a memorable tie at Wembley. But they were relegated in the same season and lost their manager Roberto Martinez to Everton.
This season has been a stark contrast to the glory days of 2013.
Wigan currently find themselves second from bottom in the Championship, staring relegation to third tier in the face. Last night they were defeated 3-0 by Charlton Athletic at the DW Stadium and their survival hopes are looking distinctly grim.
In a bid to aid their survival hopes Malky Mackay has drafted in a former Liverpool and Arsenal player on a free transfer.
Wigan have confirmed today that they have signed Jermaine Pennant on a deal until the end of the season. BBC Sport report that the player had been training with the club this week and they are obviously impressed by what they have seen from the player.
The 32-year-old started his career at Notts County before moving to Arsenal as a youngster. He went on to have mixed spells at Leeds United, Birmingham City, Liverpool, Real Zaragoza, Stoke City and Wolves. Most recently he played for Indian Super League side FC Pune City but has been a free agent since that league ended in November.
Wigan will be hoping the former England under-21 international can help claw themselves to safety.