Pete, who turned 42 in February 2015, posted the old snap on the eve of his birthday with the caption:
'I'll be 23 tomorrow. I haven't changed a bit.. Except my nappies.'
Pete was married to Katie Price for three-and-a-half years. They have two children together, Junior Savva and Princess Tiaamii.
Read our exclusive interview with Peter here (he really is as lovely as he seems on telly).