Melissa Rauch As Bernadette Rostenkowski-Wolowitz
Bernadette was originally introduced in Season 3 when Penny offered to match her up with Howard. Bernadette later appeared in Seasons 4 and 5. Despite the fact that there was no apparent chemistry between them, the couple ended up getting married several seasons later. Bernadette immediately established herself as a regular character on the show, functioning as Penny’s first female friend.
Lauren Lapkus As Denise
Denise, the assistant manager at Stuart’s comic book store, was played by Lauren Lapkus in the film. Sheldon didn’t like her at first, but after learning that she was actually interested in comic books, he warmed up to her and they became friends. Denise and Stuart had a romantic relationship that culminated in their moving in together toward the end of the series.