The Bhoys qualified through a group that included tournament favourites Barcelona to set up a meeting with Italian champions Juventus on Tuesday night.
Ahead of that clash, Lennon has admitted that he has been given some "pointers" from his Manchester United counterpart.
"Sir Alex came up to see us for a few hours one afternoon. He took time out of his heavy schedule to visit myself and my backroom team," he told a press conference.
"Throughout the campaign we have been in touch. He has given little bits of advice about what to look out for and for a young manager he is fantastic in that way - he is always willing to help.
"He's gone out of his way at times to help us. Not in a huge way, but just little pointers in the right direction."
The return leg in Turin will be played on Wednesday, March 6.