Rangers face Queen of the South in the second leg of their Scottish Premiership play-off quarter-final this weekend, having won the first leg 2-1 at Palmerston Park.
And Lovenkrands feels the Gers' much-criticised duo will be essential to the club's hopes of taking them through the play-offs.
Both on and off the pitch, the experienced pair will be helpful at Ibrox in terms of aiding the younger players, he feels.
The former Rangers star said: "Some of the players they have in the team are what Rangers need to go through this. You have players like Kenny Miller and Lee McCullloch and Kris Boyd around the team who are very, very experienced and played at the highest levels around the world.
"They have to take that into these games and help the players who haven’t got that. It’s a good mix and match between older and younger players. Rangers do have a good squad to go up but I think they have to strengthen if they get into the Premiership."
Forward Miller has recently been handed a new contract at Rangers but many supporters have expressed their doubts as to whether the 35-year-old should have been kept at the club.
The veteran's form has been heavily questioned this term, while the same could be said of McCulloch - with the sentiment applying even more so.
Lovenkrands obviously feels their experience is something Rangers cannot go without, however, and we may find out whether he is right on Sunday afternoon, when the Gers take on QOS at 3.30pm.