The 48-year-old singer was performing in Glasgow when he took a moment between sings to pay tribute to his son, Charlie.

Robbie Williams gets crowd to sing Happy Birthday to his son Charlie, 8, in a touching moment

Robbie Royal Albert Hall

Robbie Williams announces two Royal Albert Hall dates to be filmed for upcoming biopic 'Better Man'

The Robbie Williams documentary is being filmed by the same people behind Liam Gallagher's 2019 film As It Was.

Robbie Williams promises new Netflix documentary will be "warts-and-all"

Robbie Williams - 'Lost'

Robbie Williams unveils excellent brand new single 'Lost' from new greatest hits album

Friends of George Michael has spoken out about the impact the star had on their lives. (Clockwise from left: George Michael and Geri Halliwell, Elton John, Andrew Ridgeley, Brian May and Robbie Williams))

How George Michael changed my life: Famous friends reveal his lasting influence

George Michael

Robbie Wiliams, 46, and his father Pete Conway, 70, have a special bond and have performed together for years

Robbie Williams and his dad: The fascinating story of the singing pair’s relationship

Robbie Williams is back

Robbie Williams announces huge 'XXV' arena tour to celebrate 25 years as a solo artist

Robbie Williams' new album

Robbie Williams appears naked on cover for new album of orchestral versions of his classic hits

The Take That star was performing at a gig in Stuttgart, Germany when an unknown man ran on stage and aggressively pushed Williams off the stage and into the crowd.

Horrific moment Robbie Williams was pushed off-stage and broke down in tears

Robbie Williams - Angels

Noel Gallagher dismisses 'Angels' by Robbie Williams as just "Oasis by numbers"

Elton John and Shane Warne

Elton John performs moving 'Don't Let the Sun Go Down on Me' tribute at Shane Warne memorial

Music

Robbie Williams and Shane Warne

Robbie Williams performs emotional 'Angels' tribute at Shane Warne's memorial

Robbie Williams in concert

Robbie Williams 'is re-recording his biggest hits with an orchestra and planning a UK tour'

1990s love songs

The 30 greatest love songs of the 1990s, ranked

Song Lists

Robbie Williams has said that a hitman was hired to get him

Robbie Williams claims a hit man was once hired to kill him when he was "Michael Jackson-like famous"

5 spine-chilling supernatural stories from music legends to give you a fright this Halloween

5 spine-chilling supernatural stories from music legends to give you a fright this Halloween

Features

Robbie Williams son Charlie gets identical mohawk haircut from Robbie

Robbie Williams gives identical mohawk haircut to his son Charlie in cute video

Gary Barlow and Robbie Williams have been friends for years

Inside Robbie Williams and Gary Barlow's feud and friendship over the years