Robbie's Take That Shock

Robbie Williams & Gary Barlow on-stage togetherIt was the moment Take That fans have waited 15 years for...

To see Robbie Williams re-joining his former boyband in a singing masterpiece.

But, alas, even though Robbie got on-stage with Gary Barlow and co...

We're going to have to wait a little longer for an actual reunion.

The Bodies singer joined Take That on-stage at the BBC Children In Need Rocks concert held at London's Royal Albert hall, but did not perform with them.

Former bandmate Gary announced Robbie's arrival, saying: "What a perfect night for us to introduce an old friend."

After the brief reunion, according to Sky News, Robbie later said: "Something's planned and you don't want to shoot your bolt, do you?

"I started tearing up just before I came on and the lads were singing and knowing it was just about to happen and knowing what the reactions were going to be like and then all my team were like 'Please don't cry'.

Lily Allen performs at the BBC's Children in Need concert."And I think we should have milked it for a lot longer than we actually did. I think Gaz, in his wisdom went 'Right, we should get off now, let the lad do his singing'. That was probably what was in his head because I was trying to get them back to do a bow and everything.

"That's the first time in 15 years, we should have least stayed there for 10 minutes."

Gary said: "When we were all stood in a line we didn't want to leave, it felt great having him back. It feels like he's back, it does."

In total, the concert raised more than £500,000 and other big-name stars like Cheryl Cole, Leona Lewis, Lily Allen and Katherine Jenkins also performed.

See the glamour from the evening in our gallery of SOCIAL BUTTERFLIES.