X Factor judge Simon and his American partner Lauren welcomed Eric into the world in February and it's fair to say their little one is growing up fast!
Last night, Simon recorded an adorable video of his boy crouched on the floor while playing a toy drum. And what was he bopping along to? One Direction of course!
In the short clip, posted onto Simon's official Facebook page, 1D's 'Story Of My Life' can be heard blasting out in the background. Eric then gives the camera a winning smile a few seconds in. Cute!
Commenting on the video of his son, Simon joked: "One Direction have just hired Eric as their new drummer."
Meanwhile, Simon and his fellow X Factor judges are gearing up for another week of live shows and this Saturday the theme is 'Big Band'.
Unlike Mel B, Cheryl Fernandez-Versini and Louis Walsh, Simon still has all four acts left - and doesn't everyone know it!
Last weekend, Simon made a big point of telling the judging panel and viewers at home that he is riding high in the competition.
But the music mogul has shown some compassion too. After Paul Akister was surprisingly eliminated on Sunday night, Simon tweeted: "I feel very bad for Paul tonight. A great singer and a great guy. Worth remembering Ella [Henderson] bounced back."
See, he's a big softy really!
Watch Simon's video of Eric here:
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