AceShowbiz -

Niall Horan has been enjoying much time in Los Angeles since One Direction announced that they were taking a hiatus last year. He recently paid a visit to Disneyland, but he wasn't not alone. The Irish heartthrob apparently had a good time with a mystery girl as they ventured on every ride inside the amusement park.

In some photos obtained by Daily Mail, Niall kept it casual in khaki shorts, a white T-shirt and a baseball cap. The mystery brunette, meanwhile, rocked blue high-waisted skinny jeans, a black tank top and Minnie Mouse ears on top of her head. Niall could be seen sitting behind her while stroking her hair when they were on a water ride called Splash Mountain.

In another snap, the pair were strolling the happiest place on Earth. Like Niall, the girl hid her eyes in a pair of sunglasses as she accompanied the singer to a range of attractions including Toy Story Mania, California Screamin' and Space Mountain. The 23-year-old star was also accompanied by friends and a bodyguard, who kept a distance from the group.

On Friday night, March 31, Niall was seen leaving Ariana Grande's concert at Los Angeles' The Forum with a mystery female friend. The pair were seen chatting with other friends outside the venue after the gig, which also featured a performance from Little Mix. The "This Town" hitmaker opted for casual look for the night out, teaming a blue shirt with a pair of skinny jeans and white sneakers.