David Harbour and Lily Allen make red carpet debut as a couple at Champions for ...

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They have just gone public with their romance in the past week.

But now it's out there, David Harbour and Lily Allen are ready to make their red carpet debut as a couple.

The American actor, 44, and the British singer, 34, arrived together for the Champions for Change Gala in New York City on Thursday night.

Together: They have just gone public with their romance in the past week. And on Thursday, David Harbour and Lily Allen made their red carpet debut at a charity fundraiser in New York

Together: They have just gone public with their romance in the past week. And on Thursday, David Harbour and Lily Allen made their red carpet debut at a charity fundraiser in New York

On Monday, Allen had posted to her Instagram that she was leaving her native UK to live in New York 'till after Brexit'.

She was already in the Big Apple where she was seen with the Stranger Things star after his hosting gig on SNL last Saturday night.

The pair were also snapped packing on the PDA on an outing in the city on Monday.

While their appearance at the charity fundraiser Thursday was more muted, they seemed relaxed and happy in each other's company knowing the eyes of the world were on them.

Couple: The American actor, 44, and the British singer, 34, posed for photos as they arrived for the Champions of Change Gala

Couple: The American actor, 44, and the British singer, 34, posed for photos as they arrived for the Champions of Change Gala

Simpatico: The two made a statement by styling their hair with matching half topknots

Simpatico: The two made a statement by styling their hair with matching half topknots

Pretty: Allen chose a patterned ankle-length frock with half sleeves for her night out. The floral-themed outfit had a Peter Pan collar with pink tie and she added black suede boots

Pretty: Allen chose a patterned ankle-length frock with half sleeves for her night out. The floral-themed outfit had a Peter Pan collar with pink tie and she added black suede boots

Dapper: Harbour went with an all black ensemble of two-piece suit and buttoned up shirt with shiny slip-on shoes

Dapper: Harbour went with an all black ensemble of two-piece suit and buttoned up shirt with shiny slip-on shoes

Allen chose a pretty patterned ankle-length frock with half sleeves for her night out.

The colorful floral-themed outfit had a Peter Pan collar with pink tie and she added a pair of black suede boots.

The pop star styled her short dark hair with a half topknot and accessorized with drop diamond

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