The Prime Minister insisted that the UK-US so-called special relationship would "continue to prosper" with the President-elect.
Sir Keir is among leading Labour politicians who have been critical of the Republican in the past.
He also faces a challenge to mend fences after a row over Labour staffers heading across the pond to campaign for Democrat Kamala Harris.
The PM, who once declared himself to be "anti-Trump but proAmerican", rushed to congratulate the 78-year-old on his "historic election victory" after US voters returned him to the White House.
Sir Keir said: "I look forward to working with you in the years ahead.
"As the closest of allies, we stand shoulder to shoulder in defence of our shared values of freedom, democracy and enterprise. From growth and security to innovation and tech, I know the UK-US special relationship will continue to prosper on both sides of the Atlantic."
Last night he spoke to the President-elect and "said he looked forward to working closely with President-elect Trump across all areas of the special relationship...from defence and security to growth and prosperity", Downing Street said.
Denne historien er fra November 07, 2024-utgaven av Daily Express.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
Allerede abonnent ? Logg på
Denne historien er fra November 07, 2024-utgaven av Daily Express.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
Allerede abonnent? Logg på
Raducanu and Boulter put Brits close to final say
EMMA RADUCANU and Katie Boulter blew away defending champions Canada to help Great Britain reach the Billie Jean King Cup semi-finals.
RATTLED GATLAND FEARS THE WORST
Wales job is on line after a record 11th straight defeat
Robbie and Pamela's all white night out
EVERYTHING was all white on the night for Robbie Williams and Pamela Anderson as they hit the red carpet in LA.
Rape suspects' plea plot to avoid justice
Delaying tactic means more victims pull out, says CPS head
Ruth heads Down Under... but for a TV spin-off show
PRESENTER Ruth Langsford is jetting Down Under following her marriage break-up from Eamonn Holmes to front a spin-off of I'm A Celebrity.
'I canoe it!'...canny Coleen hits jackpot
COLEEN Rooney battled it out in a canoe task in the first episode of I'm A Celebrity while some of her campmates had to tuck into a horrific drink.
PM rebukes Streeting for repeated opposition to assisted dying
SIR Keir Starmer has criticised Health Secretary Wes Streeting for his public interventions against the legalisation of assisted dying in England and Wales.
Hunt for husband after wife found dead in boot
POLICE have launched an international manhunt for the husband of a woman found dead in the boot of a car.
Trump eyes Rwanda deportations
DONALD Trump is considering adapting the Rwanda scheme that Sir Keir Starmer dumped.
LABOUR WAR ON FARMERS IS 'THREAT TO FOOD SECURITY'
LABOUR'S \"war on farmers\" has been slammed for risking food security.