Kate Hudson’s five-year-old son was horrified when he saw her in a sexy outfit on the set of her new film ‘Nine’.

The ‘Almost Famous’ actress took Ryder to watch the shooting of her singing sequence for the stage musical-turned-movie.

However her son was left stunned when he saw the skimpy dress his mother was wearing.

“Ryder came to the set when I was doing my number and I remember him feeling (shocked),” Contactmusic quoted her as saying.

“He actually grabbed my face at one point when I took him up onstage when I was wearing all the (clothes) – to him, it must have looked like, ‘What is my mother doing? This is so embarrassing.’ He looked at my face and went, ‘Mum, everybody’s staring at you.’ Well, honey, that’s the way it goes – I’m wearing a sparkly nothing!”