Fresh from his side's 4-1 win on Saturday, Lennon took the disruption in good heart and simply answered the call to the amusement of the waiting press pack.
"She's hung up," he declared, after efforts to establish who was calling. "She's not happy ..."
It quickly transpired that it was the wife of one of the reporters, prompting teasing from Lennon.
"You in trouble again, aye?" the Lurgan man asked.
While talk returned to football, the phone then rang again and Lennon grinned as he first asked the reporter what his wife's name was and then took the call.
"Sharon," he said cheerily. "Sharon, are you going to stop interrupting my press conference please? This is Neil Lennon here ..."
After listening to the reaction, Lennon burst out laughing. "Oh ... You're not going out tonight," he jokingly warned the reporter to more chuckles around the Parkhead press room.
Lennon has since tweeted that Celtic are facing a tough match on Tuesday night, when they take on Dundee United - but that he's already looking forward to the press conference ...