Katherine Boecher (Lilith) is scheduled to attend Rogue Events' Asylum 4, Houses of the Holy, to take place 14th-16th May 2010 at Hilton Birmingham Metropole, National Exhibition Centre, Birmingham, UK.
As was already announced, Jim Beaver (Bobby Singer) is also scheduled to attend the event.
Source: Asylum 4.
Disclaimer: WinchesterBros.com and MediaBlvd.com are in no way connected to the event.