Most recently, the 37-year-old actor was caught out flirting with the short-film director after leaving London's Groucho Club on Tuesday, September 15.
According to Just Jared, the two were spotted getting into a rickshaw, which was supposed to take them to their next destination. Smith was seen stroking Russell's hair during their wait, and the two looked quite comfortable in each other's company.
Russell has directed several films and has worked on quite a few commercials. Her website shows that she graduated from the MA Directing Fiction course at the National Film and Television School in 2016. Currently, she is said to be working on her first feature film.
However, Russell is not the only single lady that Smith is said to be seeing. He was also spotted with Clarke, 33, last week on September 11. The two were seen sharing a laugh before heading out for a low-key dinner at the Bob Bob Ricard restaurant in London. Clarke wore white pants and pseudo boots, while the actor sported a white T-shirt with jeans and a jacket.
The former Doctor Who star has been dating ever since he split with Lily James in December after a five-year relationship. After the breakup, he was said to have grown close with his Crown co-star, Claire Foy, and it was rumored that they romanced briefly during quarantine.