Jenna had a small role in one of the "Nash Bridges" episodes many years ago. She was a suspect in a crime. I still remember Nash pointing out to Cheech's character, "Look at her. Do you think she could hide anything inside those?" He was referring to her bra size.
I have noticed when an adult performer plays in a film, it is usually blown up to an incident, even when it is a cameo role.
Jenna has played in the zombie movie, though. She appeared credited alongside Robert Englund. Quite an achievement. Yes, Robert has done the whole horror thing to death, literally. It still is noteworthy that Jenna managed to escape ham acting and put some real in her role.
Sasha Grey of course is now hailed as a "mainstream artist." I expect she will do really well, especially looking at her little "PG Porn" things with James Gunn.
They just advertise it a lot in the adult world. So and so has gone "mainstream."
Maybe someone else can give more accurate info such as dates.