He knew about the couple’s secret romance in February last year at the Brit Awards but kept his lips sealed.
Louis continued: “I remember being outside and sharing a cigarette with them and him being excited and trying to play it cool.
“But I’m really happy for him. I think it’s important that Liam has someone around him who’s going to really look after him.
“I don’t know Cheryl too well.
“I’ve always thought she’s lovely, so hopefully she looks after our Liam.”