Skyhawk 172/Cutlass 172
Flight Crew Commercial; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 60; Flight Crew Total 390; Flight Crew Type 200
Inflight Event / Encounter Loss Of Aircraft Control; Inflight Event / Encounter Wake Vortex Encounter
Air Traffic Control Issued Advisory / Alert; Flight Crew Regained Aircraft Control
Environment - Non Weather Related; Procedure
We were doing the ILS 11 approach into STL. We were cleared for the approach. There was no mention of 'caution wake turbulence'; but we were told of a regional jet landing parallel on Runway 12R a few minutes prior.  As we were descending from the FAF there was noticeable light turbulence. However; it all of a sudden became violent and caused the aircraft to roll into an uncontrolled 60 degree bank to the left! We overcame the incident and managed to recover just fine. The rest of the flight was uneventful.
C172 pilot reported a 60-degree bank resulted when wake turbulence from a regional jet landing on a parallel runway was encountered on approach to STL.