As a child, Kiernan Shipka didn't realize just how "intense" her acting on "Mad Men" was.

Kiernan Shipka says being a child actor was ‘intense’

"I'm surprised because I didn't really think it was hard work at the time," Page Six said at the premiere of "The White House Plumbers" earlier this week.

The 23-year-old actress explained that she was too young to really know what she was doing.

Kiernan Shipka says being a child actor was ‘intense’

"I didn't know anything else," she said. "That's what I did. But when I look back on it, I say, “Yeah, that was really intense.

Shipka played  Sally Draper throughout the series from 2007 to 2015, starting when she was just 7 years old.

In this critically acclaimed drama, her character survives her parents' bitter divorce and the death of her mother.

The 'Chilling Adventures of Sabrina' actress also appreciates how lucky she was to get the role.

Kiernan Shipka says being a child actor was ‘intense’

"I was very lucky as a child," she said.“Just trust the performance and don't doubt it. And I, in turn, think I didn't really doubt myself

and discovered my abilities in a way I couldn't have done if they had been suppressed or  tried to take them away from me, shape them or change them somehow..."

"They let me be on this set," she added, "and I'm very grateful to them for that. I've looked into it. And learning about the executions and the people behind the scandal was very surprising.

It was all so shocking,” she said. "I was very surprised to read each script, and the more I learned, the more I thought, 'Wait...

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