Rovers fans are being given the opportunity to win a shirt signed by new boss Paul Lambert.
Lambert proudly displayed the shirt during his unveiling to the media at Ewood Park on Monday.
After taking his first training session with the players at Brockhall, the new manager signed the shirt and left a short message, which reads: '1st day in the job, Best wishes, Paul Lambert.'
To be in with a chance of winning the prize, all fans have to do is guess what the attendance will be for the new manager’s first home game in charge against Sheffield Wednesday next weekend.
To register your answer, tweet the @onerovers Twitter account, with your name, attendance and #shirtcomp.
The deadline for entries is Friday November 27th.