I only tried Jason Statham [I'm a fan! ].
Also - I went directly to the Table rather than the query - but I don't think it matters which one you use.
1. You have a Jason Stratham starring in 'Mechanic' [which I promised myself I wanted to see and haven't yet . . . ].
2. I suspect something is going on with the DATA in one or more of your Star & CoStar FName & LName fields.
When I put a Trim function on the data it works [extraneous invisible characters being removed from the text in those fields?].
Code:
SELECT Trim([StarFName])+" "+Trim([StarLName]) AS Star, Trim([CoStarFName])+" "+Trim([CoStarLName]) AS CoStar, Movies.MovieTitle
FROM Movies
WHERE (((Trim([StarFName])+" "+Trim([StarLName]))=[Starring])) OR (((Trim([CoStarFName])+" "+Trim([CoStarLName]))=[Starring]));
Let me know if this works for you.
All the best!