The singer, 26, told how he and Louis, 27, still keep in regular contact and have always had a strong connection since the days they tried to ‘manage the band’ together.
Speaking to Mirror Online, Liam said: ‘I speak to Louis all the time, Louis is great. He’s doing really well.
‘We’ve always had a good connection in the way that we were both trying to manage the band together.
‘And that’s followed into life, and obviously he has been through a hell of a lot. So I’ve tried to be there for him as much as possible, and so does he me.’
The pair didn’t always enjoy such a close relationship as Liam admitted he ‘hated’ Louis in the early days of One Direction as they both sought to be the ‘leader’ of the group.
They are now both parents with Liam sharing son Bear, two, with his ex Cheryl and Louis father to his son Freddie, three, with Briana Jungwirth.
In the same interview, Liam discussed One Direction’s previous feud with Justin Bieber which began in 2015.
The Strip That Down hitmaker revealed he put the beef to bed when he had a conversation with Justin about it in his trailer and described the singer as a ‘really nice kid’.
Liam further opened up about his friendship with Louis in a recent interview on The Jonathan Ross Show.
‘I feel like me and Louis always had the most connection through everything,’ he said.
‘There was a point where me and Louis did not get on at all, we absolutely hated each other.
‘There was huge friction. At the start of it me and him just didn’t click at all. Then we kind of bonded together.’
Louis’ sister Félicité, 18, accidentally died from an overdose of cocaine, an anxiety drug and painkillers.
It came after Louis’ mother Johannah lost her battle with leukaemia in December 2016, aged 43.
Discussing the ways in which his grief influenced his songwriting process, Louis told Yahoo Entertainment: ‘I had a couple of things in my personal life which made momentum a little bit more difficult, naturally.
‘I touched on [grief] with ‘Two of Us,’ but I definitely kind of told that story with that, I felt like I needed to get that off my chest creatively in my songwriting because around that time, it was hard for anything to feel more important, obviously, than that.’
The Just Hold On hitmaker continued: ‘I feel like I’m in a good place in my life, and naturally with that comes happier songs. So I think it all depends on what headspace you’re in, really, at the time.’