Robin Williams’ greatest performance was at Billy Connolly party

Robin’s Scots sketch was a big hit.

Tragic movie star Robin Williams saved his greatest performance for a private party in honour of Billy Connolly, it’s claimed.

Connolly’s showbiz pals gathered at his Aberdeenshire pile Candacraig House to celebrate his 60th birthday.

And they were left stunned by Williams’ hilarious homage to a haggis, which he made up on the spot, according to film director Terry Gilliam, 73.

The Monty Python veteran revealed: “It was a big to-do and we were at Billy’s place in Scotland where a huge marquee had been set up. At one point in the evening, they piped in the haggis.

“Then Robin got up and gave this speech in praise of the haggis. It was as if he was Robert Burns. It was all in rhyme with a Scottish accent and it went on and on.

“In the midst of this whole thing a baby started crying and he somehow took the baby’s cry and incorporated it into the poem and went on.

“Five minutes later, it was done, and we were all in hysterics, falling around, just amazed. The audience, of course, was full of stand-up comedians and everybody was in awe. Nobody had that power that Robin had.”

Williams took his own life last month at his home in California.

The 63-year-old had been diagnosed with Parkinson’s disease and struggled with depression and alcoholism.