The 19-year-old singer is said to be dating pretty brunette Sophia Smith, who he attended St Peter's Collegiate in Wolverhampton with before finding fame on The X Factor.
And Liam is so lovestruck, he reportedly jetted his new girlfriend across the Atlantic so she could be by his side at One Direction's final US concert in LA on 10 August.
After traveling more than 5,000 miles from Wolverhampton, Sophia was in the audience alongside his parents Geoff and Karen, and his two sisters Ruth and Nicola, to see Liam and his bandmates perform.
"Liam has really fallen for her," a source told the Sunday Mirror. "It's getting very serious, very fast."
"She's a sweet, normal girl with likes Liam for who he is, not because he's in the most famous boy band in the world."
Most recently, Liam was in a relationship with 24-year-old dancer Danielle Peazer, and the couple are said to have remained good friends since ending their romance in May.
They met on the X Factor in 2010, started living together and even got a pet dog, Loki, together before their "very amicable" split.
Liam later admitted to US Glamour magazine, that it wasn't easy having a relationship in the spotlight.
"Yeah, that's something that is quite hard — people being a bit rude to (Danielle) on the internet.
"And it's a challenge having a relationship on the road. Credit to anyone who does it really."