It's stated in the "goofs" section about this movie, that at the Mayfield party, Richard's character says hello to Gridley but calls him Richard instead of Gridley. Actually, it's Gridley (with his back to the camera) saying hello to Richard. A closer look shows that Richard simply raises his eyebrows a bit at Gridley then gives a half-smile with no words being spoken, by Richard, until they take photos together and give their names.
Despite portraying mother and son Audrey and Wade Wilson who for the duration of the movie live in the same house, Patti Allan and Sebastian Stewart share no scenes together.