It's getting serious...

It looks like Louis Tomlinson is set to spend Christmas with his new girlfriend Danielle Campbell.

After jetting off to Chicago to be by the actresses side following his final UK performance with One Direction, the 23-year-old star lost his passport while out drinking, meaning he may struggle to make it home before the big day.

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A fan later discovered the official document, along with various other possessions belonging to the singer, tweeting: ‘Hey @Louis_Tomlinson, if you want your coat or passport my friend Mal has it. U left it at the party LN.’ However, it’s unsure if it’s made its way back to him.’

Although Louis and Danielle, 20, haven’t officially confirmed their relationship, the dad-to-be has also been spending a lot of time on his trip bonding with Danielle’s brother, Jay, with the pair unexpectedly getting matching tattoos on their bums.

Louis Tomlinson TATTOO
Another fan also tweeted a snap of the couple cuddling while buying ice cream.

Little is known about how the hot new couple met, but the pair were first linked in November when Louis took a selfie with their mutual friend and actress, Keelin Woodell.

Danielle, who has starred in Prison Break and Disney Channel’s Starstruck, was also spotted at One Direction’s recent Jingle Bell Ball concert in London.

We wonder how Briana Jungwirth, who is expected to give birth to Louis first child in January, feels about the whole situation?