We say alleged, because many people don't actually believe Freddie is his.
The entire pregnancy, birth and then photos of Freddie have been heavily scrutinised by fans, but all in all, Louis has generally stuck to the story that Freddie is his son.
HOWEVER, a new image of Louis has us WEAK with speculation. Enter: Louis' new teaser video for "Back To You", his new single with Bebe Rexha.
It's a blink and you'll miss it moment, but pausing it at the right moment we noticed he is wearing a T shirt with the iconic Michael Jackson on it. Not only that, but it's the artwork for Michael's song, "Billie Jean."
The actual shirt is part of Supreme's 'Billie Jean' collection.
If you're unaware of the song "Billie Jean", it's about a girl who claims Michael is her baby-daddy, "But the kid is not my son," the lyrics read.
THE KID IS NOT MY SON!
UM.... k. We know, it's reaching, but many fans have referenced the iconic song to Louis and his situation in the past.
Important #Larry side note: Louis is holding up a "white tee" in this shot, which directly references Harry Styles' song "Two Ghosts" which fans believe could be about Louis.
"Same white shirt, couple more tattoos" read the lyrics. Oh, and did we mention today it was announced that Harry would be released "Two Ghosts" as his next official single?