The proud player delightedly shook hands with Muhammad Ali – a man who transcended his sport to bring hope and inspiration to millions the world over.
And he posted a picture on Facebook of the proud moment, with the caption: "Here is a shot of me meeting the great man, an honour."
David was one of several star guests helping the boxing legend celebrate his 70th.
Performers including Snoop Dog, Kelly Rowland and Stevie Wonder – who flew straight in from Whitney Houston's funeral – sang for the 2,000 invitees at the gala.
It which was expected to raise millions for charities connected with Parkinson's disease, which Muhammad has battled in recent years.
Other guests included P Diddy – pictured with the man of the moment and his wife Lonnie – and Cindy Crawford.
The Greatest at 70
Heavyweight champion of verse's best quotes