The former Crystal Palace manager was snapped in the stands at Parkhead ahead of Sunday’s midday kick-off in the SPL.
Celtic will go 27 points clear at the top of the table with a win and 36 points clear of their Glasgow rivals.
Pardew has been without a job since he was sacked by Palace shortly before Christmas.
However, he could be close to a return to management with Championship outfit Norwich City.
The Telegraph claim Pardew is wanted by the Canaries as their next manager following Alex Neil’s sacking on Friday.