Olivia Colman got so 'overwhelmed' by Kit Connor's performance in an emotional 'Heartstopper' scene that she forgot her lines

• Warning: Spoilers ahead for the season one finale of Netflix's "Heartstopper."
• In a blooper reel, Oscar-winning actress Olivia Colman forgets her line mid-scene with Kit Connor.

In a new blooper reel released by Netflix, "Heartstopper" guest star Olivia Colman forgets her lines mid-scene because her 18-year-old costar Kit Connor unleashed such an "overwhelming" performance.

Last month, the Oscar-winning actress ("The Favourite," "Fleabag") surprised Netflix watchers with a cameo role in a new series called "Heartstopper." In the show, Colman plays the mother of Nick Nelson — a sweet teenage boy who realizes he's bisexual over the course of the first season.

The last scene of season one shows Nick deciding to tell his mother that he has a boyfriend. He's visibly nervous, and seems to be holding his breath while he looks pleadingly at his mom and says: "Charlie's my boyfriend."

"I still like girls," he continues. "But I like boys too. And me and Charlie, we're going out. And I just wanted you to know."

His breath is shaky, and there are tears in his eyes as he tries smiling through his nervousness.

In an outtake of this scene, Colman hugs Connor — just as she does in the final cut — but then pulls back with tears in her eyes and smiles at him.

"I can't remember my words," Colman says to Connor. Someone then enters the frame with a script so she can review the scene, and Colman thanks them.

"I just got all overwhelmed with your little face," she says as she looks over the paper.

The moment happens at about 1:20 in the video below:

In the show, the scene concludes with Nick's mom hugging him and thanking him for telling her, while also apologizing if she ever did anything to make her son feel like he couldn't tell her about his bisexuality.

Colman, who is 48 years old, has had many acclaimed roles in TV and movies across the years. In 2019, she won the Oscar for best actress for her performance as Queen Anne in "The Favourite," and delivered a memorable acceptance speech. Colman also played the Godmother in "Fleabag," Queen Elizabeth in "The Crown," and most recently starred in the Oscar-nominated film "The Lost Daughter."

Connor is no stranger to the big screen, either. The 18-year-old star of "Heartstopper" played a young Elton John in the 2019 biopic "Rocketman," and voices the character Pantalaimon in HBO's "His Dark Materials," among other TV roles.

"Heartstopper" is streaming now on Netflix.