Tilda Swinton

Tilda Swinton (Born on November 5th, 1960) is a Scottish actress.

Doctor Strange
When Stephen Strange head to Kamar-Taj to get his hands fixed, he encoutered the Ancient One (played by Tilda Swinton) who is seen barefoot.

(An interesting note is that in the original marvel comics, the Ancient One was shown to be a elderly Asian man.)