Recently-crowned French Open champion Maria Sharapova is currently in London ahead of the start of Wimbledon on 23 June.
On Tuesday she watched her boyfriend Grigor Dimitrov take on Britain's James Ward in the Aegon Championships at Queens Club.
Afterwards she jumped on the London Underground and took a selfie AND NO ONE NOTICED.
When in London Town, this is how we riiiide....occasionally :)
Sharapova joins a long list of celebrities spotted on the Tube, such as Jay Z and Chris Martin.
Jay z and Chris Martin getting the tube to the 02 show #legends
Rihanna.
Omg as if we just saw @rihanna hopping on the tube!!! #claimtofame
And, errr Geri Halliwell.
Forgive me for being a brat:-after 17 years & yesterday's 2 hrs of traffic-lets save time & money-the tube!