The 23-year-old is set to stay on at the Den after impressing in the second half of the 2018/19 season.
Monday 10 June 2019 16:43, UK
Ben Thompson is set to sign a new long-term contract at Millwall, Sky Sports News understands.
The midfielder spent the first part of last season on loan at Sky Bet League One side Portsmouth before returning to Millwall to help them secure their Championship status.
Thompson, a Millwall academy graduate, featured 13 times for the Lions during the 2018/19 campaign, scoring four goals including a double in an important 2-0 win at Birmingham.
The 23-year-old, who is a boyhood Lions fan, made his debut in a League Cup tie against Southampton in August 2014.
After helping the south London club achieve promotion back to the Championship via the League One play-offs in 2016/17, Thompson struggled for game time the following season, featuring just three times for Neil Harris' side.
He went on to score two goals and make three assists in 23 League One games during his spell at Fratton Park before being recalled to the Den in January 2019.
Manager Neil Harris is planning to overhaul his squad this summer and has already released goalkeepers Jordan Archer and Tom King, defenders Sid Nelson and Conor McLaughlin and midfielder Ryan Tunnicliffe.
But Harris has activated contract extensions for strikers Tom Elliot and Steve Morison.