Suggesting the music mogul may also make a return to The X Factor next year, Louis told the Mirror, "He's fantastic on the show because he makes everyone work hard.
"But he's got to fit in looking after a baby now - and maybe getting married."
Adding, "Totally. I think it's a possibility, I really do."
If Simon and Lauren's recent PDA is anything to go by, Louis could be onto something.
Meanwhile, the father-to-be hasn't ruled out the idea of marriage either, telling the newspaper, "You'll have to wait and see."
What a tease!
So, reckon Simon WILL put a ring on it?
SIMON COWELL: "I FEEL LIKE A VERY PROUD DADDY"
AND THE MYSTERY X FACTOR FIFTH JUDGE IS...
SIMON COWELL SPOTTED WITH LAUREN SILVERMAN