The former Swansea City boss was speaking to the Western Mail about his replacement’s chances of making the play offs this season.
“I think they can make the play-offs,” said Jackett, who left the Swansea hotseat in February 2007.
“They’re within touching distance of the top six and they’ve got great momentum as a club.
“Their home record is strong as well.
“Looking at the other two – Nottingham Forest and Doncaster – who went up with them, shows you how well Swansea have done.
“The support is very passionate and not unlike Millwall in that way.
“When you’re going well they’re right behind you at home and like a 12th man.
“Bodde played very well against us last season, he was excellent and any club would miss someone as good as him,” he said.
“But Roberto’s signed very, very well and added to the squad. It looks strong overall.”
Jackett was also keen to talk up his own side’s chances of success this term – Millwall currently lie 2nd in League One, two points beind leaders Leicester City.
“We’ve set some really high standards in the first half of the season and it’s up to us now to maintain that,” said Jackett.
“We’ve got to go for promotion now.
“We’ve worked very hard to get ourselves in this position and it’s a lot better being at this end of the league than where we were last year or the year before.
“It’s a challenge we should enjoy, and go for it in the second half of the season.”