Jason McCarthy says he "always had one eye on Millwall" and is thoroughly excited to get started at The Den after completing a permanent transfer from Wycombe Wanderers.
McCarthy becomes Neil Harris' seventh signing of the summer window, and describes the club as one which "really suits" him.
"I'm absolutely delighted to be here now, it was quite long-winded but I'm glad to get the deal done," the full-back said to millwallfc.co.uk.
"I'm definitely excited to be another addition to a squad at Millwall where it seems something really good is building - I've kept a close eye on the other signings being made here.
"I first heard of interest from Millwall a couple of years back, and it resurfaced this summer - I've always had my eye on this club as one which really suits me, both as a person and as a player. I'm a hard-working player, and I know that the club's core value is all on that. I can't wait to get down to business, and show the fans and teammates what I'm about. Millwall is an iconic club, and I can't wait to get started."
The 23-year-old gives an insight into his attributes as a player, and claims he feels sharp ahead of the weekend's beginning to the 2019/20 campaign.
"I'm primarily a right-back, I love to get forward, but I pride myself on my defensive responsibilities. first and foremost. I can fill in at centre-back and left-back, and also on the right side of midfield.
"I've played a lot of games for my age - over 160 games - so I have a lot of experience for my age, and I want to stamp down my marker here and add to an already impressive squad. Hopefully we can have a successful Championship season.
"I'd have liked to get in front of the manager in pre-season, but I have had a good pre-season under my belt and there's a lot of excitement to see what the season holds now."
McCarthy previously spent time as teammates with certain players in The Lions' squad - and is pleased with the camp he is arriving into to "make the club proud".
"I know Tom Bradshaw and Connor Mahoney from my time at Barnsley - myself and Connor both didn't play as much football as we'd have liked there - but Connor seems to have settled in really quickly here from speaking to him.
"I might have to try and wrestle Connor off set-piece duties! The rest of the boys will be new to me, but I look forward to settling into the squad and getting in amongst it.
"The core of the squad has stayed the same, which is important as well as having two years already in the Championship, and we've added in areas which have needed strengthening. I look forward to bringing my part to the table. A club like Millwall shouldn't fear anyone, and anyone who comes to The Den finds it an intimidating place to visit. We need to firstly make The Den a fortress, but going to these big clubs and stadiums is something we should relish and look to make the club proud."