Photo: SplashNo “Slow Hands” here!Niall HoranandHailee Steinfeldwere spotted kissing in Los Angeles on Thursday, marking their first public display of affection since romance speculation firstsparked in February.The pair, who have kept their romance largely under wraps, coordinated in white T-shirts and sunglasses.As they walked to Target, Steinfeld, 21, hung her arm around Horan, 24, as they shared a smooch.The pair continued to indulge in some PDA as they waited for the elevator.Chris Polk/GettySix months before their outing on Thursday, the couple wasspotted together for the first timesinging and dancing at aBackstreet Boysshow in Las Vegas, but a source told PEOPLE at the time the actress was newly single and not ready to jump into a new relationship.RELATED VIDEO: Get the Look: Hailee Steinfeld’s Rockstar Half-Up Pony“She’s not actively pursuing anything. Niall is really into her but she’s unsure if she wants to get into something new right away,” said the source.The former One Direction band member raved about theBumblebeeactress on Instagram for her birthday in December, calling her the “loveliest person on the planet and one of my best friends.”Then in May, Horan and Steinfeld were spotted on a low-key date at Los Angeles hot spot E.P. & L.P.“Niall had his arm around Hailee and they were holding hands,” an onlooker told PEOPLE exclusively. “They definitely looked like a couple.”And in June, they enjoyed arare romantic day outin New York City.

Photo: Splash

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No “Slow Hands” here!Niall HoranandHailee Steinfeldwere spotted kissing in Los Angeles on Thursday, marking their first public display of affection since romance speculation firstsparked in February.The pair, who have kept their romance largely under wraps, coordinated in white T-shirts and sunglasses.As they walked to Target, Steinfeld, 21, hung her arm around Horan, 24, as they shared a smooch.The pair continued to indulge in some PDA as they waited for the elevator.Chris Polk/GettySix months before their outing on Thursday, the couple wasspotted together for the first timesinging and dancing at aBackstreet Boysshow in Las Vegas, but a source told PEOPLE at the time the actress was newly single and not ready to jump into a new relationship.RELATED VIDEO: Get the Look: Hailee Steinfeld’s Rockstar Half-Up Pony“She’s not actively pursuing anything. Niall is really into her but she’s unsure if she wants to get into something new right away,” said the source.The former One Direction band member raved about theBumblebeeactress on Instagram for her birthday in December, calling her the “loveliest person on the planet and one of my best friends.”Then in May, Horan and Steinfeld were spotted on a low-key date at Los Angeles hot spot E.P. & L.P.“Niall had his arm around Hailee and they were holding hands,” an onlooker told PEOPLE exclusively. “They definitely looked like a couple.”And in June, they enjoyed arare romantic day outin New York City.

No “Slow Hands” here!

Niall HoranandHailee Steinfeldwere spotted kissing in Los Angeles on Thursday, marking their first public display of affection since romance speculation firstsparked in February.

The pair, who have kept their romance largely under wraps, coordinated in white T-shirts and sunglasses.

As they walked to Target, Steinfeld, 21, hung her arm around Horan, 24, as they shared a smooch.

The pair continued to indulge in some PDA as they waited for the elevator.

Chris Polk/Getty

2017 American Music Awards - Roaming Show

Six months before their outing on Thursday, the couple wasspotted together for the first timesinging and dancing at aBackstreet Boysshow in Las Vegas, but a source told PEOPLE at the time the actress was newly single and not ready to jump into a new relationship.

RELATED VIDEO: Get the Look: Hailee Steinfeld’s Rockstar Half-Up Pony

“She’s not actively pursuing anything. Niall is really into her but she’s unsure if she wants to get into something new right away,” said the source.

The former One Direction band member raved about theBumblebeeactress on Instagram for her birthday in December, calling her the “loveliest person on the planet and one of my best friends.”

Then in May, Horan and Steinfeld were spotted on a low-key date at Los Angeles hot spot E.P. & L.P.

“Niall had his arm around Hailee and they were holding hands,” an onlooker told PEOPLE exclusively. “They definitely looked like a couple.”

And in June, they enjoyed arare romantic day outin New York City.

source: people.com