Lewis Hamilton has apologised for making "inappropriate" comments in a video in which he appeared to mock his nephew's princess dress.
In an Instagram video, which has since been deleted, the Formula 1 driver says "boys don't wear princess dresses".
He was criticised on social media for the clip, which was apparently filmed on Christmas Day.
The 32-year-old tweeted his "deepest apologies", saying he loved that his nephew "feels free to express himself".
The video, posted on his Instagram story, shows Hamilton speaking to the camera before turning it on his young relative.
"I'm so sad right now. Look at my nephew," he says.
The camera then shows the boy wearing a pink and purple dress, while holding a toy magic wand.
'Really not acceptable'
Hamilton asks him: "Why are you wearing a princess dress? Is this what you got for Christmas?"
The young boy starts laughing as the British racing driver continues: "Why did you ask for a princess dress for Christmas? Boys don't wear princess dresses."
In response to the video, founder of anti-bullying charity Ditch the Label Liam Hackett tweeted: "Disappointing to see somebody with such a huge platform use it to publicly shame and attempt to undermine a small child."
Meanwhile, Imraan Sathar of discrimination support charity Stay Brave UK, called for the driver to be stripped of his MBE.
Hamilton later apologised for his behaviour and said it was "really not acceptable" to marginalise or stereotype anyone.
Yesterday I was playing around with my nephew and realised that my words were inappropriate so I removed the post. I meant no harm and did not mean to offend anyone at all. I love that my nephew feels free to express himself as we all should.— Lewis Hamilton (@LewisHamilton) December 26, 2017
My deepest apologies for my behaviour as I realise it is really not acceptable for anyone, no matter where you are from, to marginalise or stereotype anyone.— Lewis Hamilton (@LewisHamilton) December 26, 2017
I have always been in support of anyone living their life exactly how they wish and I hope I can be forgiven for this lapse in judgement.— Lewis Hamilton (@LewisHamilton) December 26, 2017