The Bees defender is carving out a name for himself in West London and admits he has modelled himself on the Chelsea star.
He said: "I've always wanted to play against John and to do so is a dream come true.
"He's my idol and he's always been my favourite centre-half.
"I model myself on John - not just in tackling but with playing with my heart on my sleeve. I love a tackle and I put my body on the line and that's exactly how John plays.
"If I had half the career he's had, I'd be happy. It would be lovely to out-jump John and put one in the back of the net.
"But whether or not it happens is a different thing."
Terry added: "I see a lot of myself in Harlee.
"It's going to be nice for us to come up against each other for the first time."