The 27-year-old actress joined Matt, 30 and creator Steven Moffat for the fan event for a Q&A panel with a sold out crowd of fans.
Later on, Jenna and Matt headed to an autograph signing before heading out for the night.
The Day of the Doctor airs TOMORROW on BBC and BBC America. Check your local listings for exact times.
25+ pics inside…
Posted to: Jenna-Louise Coleman