"I am pleased to announce that Kelly Knight Craft, our current Ambassador to Canada, is being nominated to be United States Ambassador to the United Nations," Trump tweeted.

He praised Kelly Knight Craft for her performance.

"Kelly has done an outstanding job representing our Nation and I have no doubt that, under her leadership, our Country will be represented at the highest level. Congratulations to Kelly and her entire family!," he said.

The announcement has been made just a week after US State Department spokeswoman Heather Nauert  withdrew her candidacy.

Kelly will replace Nikki Haley.

Haley reigned from the post last year.

Nikki tweeted: "Congratulations to Kelly Craft. She’s done a great job representing us as @USAmbCanada and we know she’ll be a strong voice for America at the United Nations. #USstrong."

Image: Donald Trump Facebook page