Murray Wallace was "delighted" to put pen-to-paper on a new long-term contract at The Den earlier this week.
The 28-year-old full-back, who has made 94 appearances for the club since joining from Scunthorpe United, will remain a part of Gary Rowett's first-team squad plans for the next few years.
The Scot becomes the third Lion to extend his stay in SE16 this week, after Danny McNamara and Tyler Burey signed deals.
"I'm delighted," he told millwallfc.co.uk. "When the chats first came about regarding extending the contract, it was brilliant to hear.
"I came to Millwall because I wanted to play a lot of games. I'm grateful to Neil Harris, who signed me, and Gary Rowett too - I have been a part of both of their plans."
The defender is currently out with an injury, but is hoping that a return to full training isn't too far away.
"The recovery from the injury is going well. I was hoping to be out of the boot a bit sooner, but I have to keep it on for another week or so now. However, once I am out of the boot, it should be around 2-3 weeks until I am back to full fitness.
"It has been frustrating because there has been so many games, with the Saturday/Tuesday or Saturday/Wednesday schedule, so if you're out for a few weeks then you end up missing a lot."
Wallace has been involved in some memorable matches since his arrival at the club - and will hope to be present for more - and there is one particular night which is unforgettable in his mind.
"That night against Everton still gives me goosebumps. The reaction of the crowd - the whole atmosphere inside The Den, it makes you really miss having fans in the stadium. You can't beat that reaction and those celebrations."
Click play on the video above to hear in full from Murray Wallace.