Oprah on the one star who left her feeling "intimidated" at work.

It’s hard to imagine a situation in life in which Oprah would feel unsure of herself.

The queen of day-time television, philanthropist and media business mogul has interviewed countless “intimidating” celebrities and public figures, asking the tough questions without so much as blinking.

The woman even handled Tom Cruise’s mid-life crisis/love jump/I-don’t-even-know-what episode like the seasoned pro she is.

So when we found out a woman as accomplished and groundbreaking as Oprah still feels intimidated at work from time to time, we sighed with relief. You guys, she really is just like us. (Minus the millions, etc.)

Speaking to People magazine, the Academy Award nominated actress admitted she experienced self-doubt in relation to her role in her new film, The Immortal Life of Henrietta Lacks.

"I’d never played a role like that and nor have I done it enough to feel really solidly comfortable in the space," she said.

Turning to her friend and co-star Reese Witherspoon for advice, Oprah said: "It’s rare that I feel intimated, but I felt intimidated."

"I was on set the other day with Wrinkle in Time and I said to Reese, ‘So Reese, how many movies have you done?’ and she said, ‘I don’t know, I don’t know … Hundreds, I don’t know.’"

"So I was like 'Oh God, please don’t ask me how many movies I’ve done.'"

Hangin' with @reesewitherspoon ,@mindykaling the Mrs's from Wrinkle in Time, sending ❤️ your way Valentines. #happyvalentinesday

A post shared by Oprah (@oprah) on Feb 14, 2017 at 8:04am PST

But after all, who can blame her? We'd definitely feel intimidated taking acting advice from Reese Witherspoon too.

Come to think of it, we'd also feel intimidated taking an empty coffee cup, let alone career advice from Oprah herself.

How often do you feel intimidated by the people your work with?