The midfielder will now stay at Elland Road until March 19, after which Leeds hope to further extend the deal on a month-by-month basis.
Pennant has made 23 Premiership appearances for Leeds since joining the club in August, scoring one goal.
Pennant has made 23 Premiership appearances for Leeds since joining the club in August, scoring one goal.
The 21-year-old is likely to line up against Manchester United at Old Trafford on Saturday.