Thrillers can be highly profitable films, with Titanic being the second highest grossing film of all time at over $2 billion. While comedies are the most profitable genre overall, thrillers have higher average earnings per film at $27 million compared to $25 million for comedies. Successful thrillers are often rated PG-13 to appeal to broader audiences, though some R-rated thrillers like Se7en and Red Dragon have also found significant success.