The sweet moment was shared in an Instagram video, in which the Love Island star could be seen embracing Nikita as he came into the rehearsal space bearing flowers and a balloon.
After hugging, Amber could be seen smiling keenly and kicking her leg in the air, while the song This Is What Dreams Are Made Of from the 2003 Lizzie McGuire Movie played in the background.
"He remembered guys 😠best birthday EVER !!!! @bbcstrictly ✨ (he did infact say happy 40th birthday whilst handing me this gift..)
"Thank you so much for all the birthday love, time to celebrate with a SAMBAAAAA 🪩🩷."
Fans of the BBC show were quick to take to the comment section to discuss the heartwarming moment, with one person writing: "What a way to spend your birthday! Good luck for this evening and Happy Birthday."
Another said: "The best way to spend a birthday!! So so proud of you and all the love."
While others sent their well-wishes and birthday messages, this fan added: "Can't wait to watch you tonight!"
Last week, Amber and Nikita did very well, scoring a respectable mark of 27.
This placed them well above most of the competition, seeing them fall behind the likes of Karen and Carlos, who scored a 31.
Welsh actress Amber Davies became a household name after winning the third series of Love Island in 2017.
She has starred in a number of shows, including the CBBC "dramady"
Almost Never.
However, she may be better known for her appearances on the likes of Dancing on Ice.