The Nobel Peace Prize winner spoke at an emotional rally for Labour MP Jo Cox, who was killed in her constituency last week.
He's kind of a big deal.
The event was organised by Nepalese groups based in the capital.
BuzzFeed News asked these anti-independence demonstrators in Trafalgar Square why they are saying "naw" to this week's Scottish independence referendum.
There's a Tardis in front of the National Gallery today — and Matt Smith is grasping onto it for dear life! Spoilers ahead, I'm sure.
"Just blow the bastard!" I don't know how or why this happened, but thankfully, it did. And the music is so catchy!