Simon Cowell and Lauren Silverman are like "two teenagers dating".
The music mogul - who is expecting his first child with the New York socialite following a passionate affair - has been inseparable with the brunette beauty since she touched down in the UK, and Louis Walsh believes she's the reason the no-nonsense X Factor boss has got the spring back into his step.
Speaking to the Daily Mirror, he said: "I went out for dinner with them. I think he's going to be a great dad. She's a great influence on his life - very positive and bubbly. She seems to have got the fun back into his life. They are like two teenagers dating. I love Lauren. I love all his girlfriends. He is what he is."
The 53-year-old star previously said he hadn't ruled out tying the knot with his pregnant lover after learning that he was soon to become a dad for the first time, but he said people would need to "wait and see" if he pops the question.
However, Louis is convinced Simon will whisk Lauren - who is believed to be three months pregnant - down the aisle before their baby is born because he's "old-fashioned" and likes to follow tradition.