There's speculation that comedian Chris O'Dowd (Bridesmaids) is playing the character Dr. Donald Blake in Thor: The Dark World. If that is true, then this is our first look at the character having lunch or dinner with Jane Foster (Natalie Portman) and Darcy (Kat Dennings). Of course there's a possibility he could also be playing someone completely different, like a guy named Richard, as it says on IMDB.
For those of you not familiar with the story behind Blake, here's a brief description:
Dr. Donald Blake was created by Odin to be the host for his son Thor. He has since gained a life and sentience of his own, separate from Thor's.
Odin decided that it was time Thor learned humility. Odin had Thor surrender his hammer to him, and then sent him to Earth in the mortal guise of a crippled young medical student named Donald Blake, stripped of his memory (again) of his true identity. As Blake, Thor learned the value of humble perseverance in dealing with his injured leg, and he came to care for the sick and dying, first as a medical student, and later as a successful physician. After leaving medical school, Blake opened a private practice in New York, and quickly gained renown as a great surgeon.
Of course Marvel has been changing up a lot of things in their cinematic universe, so if the character is actually introduced it could be a completely different incarnation than the one in the comics.