The duo, who first met back when Liam auditioned for ‘X Factor’, have reportedly got closer in recent months, allegedly enjoying secret hook-ups since December.
A source, who is labelled a ‘pal’ of Cheryl of Liam, is quoted as telling The Sun: “Cheryl and Liam are in a relationship. It was unexpected but they’ve both made each other incredibly happy.”
“Cheryl has obviously known Liam for many years.
“They’ve always got on well because they are both northern and share many of the same interests.
“But there was never anything romantic between them in the past.
“Their relationship developed very quickly in December after the X Factor final where One Direction gave their final performance before starting their hiatus.”
While Cheryl has not publicly addressed her marriage in recent months, it’s widely believed that she parted ways from Jean-Bernard Fernandez-Versini in 2015.
The former Girls Aloud has hinted at the break-up on social media though, while her ‘X Factor’ boss Simon Cowell previously addressed them while speaking to Huffington Post UK, saying Cheryl is “on good form”.
Meanwhile, Liam split from long-term girlfriend Sophia Smith in October.
Speaking at the time, he told The Sun: “I’m absolutely devastated to have split with Sophia. Being on the tour all this year and being away from her was so hard. We spent so much time apart.
“But in order to do right by somebody sometimes it’s better not to do what your heart wants, but to do what’s better for them.
“Right now I’m looking forward to some alone time to figure out who I am and what I want to be.”
Both stars were in attendance at Wednesday night’s Brit Awards, but not spotted enjoying any time together.
When contacted by HuffPost UK, Cheryl and Liam's representatives both declined to comment.
Tap the picture below to launch the slideshow...