Breaking Dawn Part II is the last of five movie adaptations of Stephenie Meyer's vampire series and is released on November 16.
"It's really funny, the last one," Pattinson told Metro. "I mean, funny and completely insane.
"There's Jacob falling in love with my daughter, who grows into an 11-year-old in three months! There were so many scenes where it felt so bizarre."
The Cosmopolis actor again admitted to not being a fan of his R-Patz nickname, adding: "Yeah, I don't know how to get rid of that. It is the most annoying thing.
"I don't know who invented it. This thing with nicknames, everybody loves nicknames, it's so irritating. But it's too catchy."
Pattinson's Twilight co-star Kristen Stewart recently said that she wanted her character Bella Swan to be "the best" vampire in the series.
The Twilight Saga: Breaking Dawn Part 1 premiere - photo gallery:
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