Jenny Argutter has said she’s not phased by turning 70 as "age is just a number".
The actress reached the milestone age on December 20 and said these days she’s all about embracing the ageing process.
“I’m not quite sure how I got here!" she says in the current issue of Good Housekeeping.
"When I turned 60, it seemed like this milestone that suddenly made a person much older and I thought, ‘is it enough of a reward to have a Freedom Pass?’
"Well, actually, yes, it was!," she continued.
"Now I’ve got to a point where I think, ‘Do you know what? Age really doesn’t count – it’s just a number.”
Agutter first burst into showbusiness as a child actress in the 1960s appearing most famously in The Railway Children on the BBC’s 1968 television serial and the 1970 film version.
In her adult life, she’s starred in a series of hit films such as The Avengers and An American Werewolf in London and TV shows, including Spooks and for the past decade, Call The Midwife.
“I didn’t see this happening," she told Good Housekeeping about playing Sister Julienne for more than ten years on Call The Midwife.
"I thought we’d do six episodes and that would be it.
"I was sat on a bus once when the woman next to me said, ‘I didn’t want to disturb you, but I have to say, I watch Call The Midwife and I have a particular interest in it because I was a nun for seven years.’
"I thought, ‘Oh, my goodness, I’ve been a nun longer than her.’”
However, the mother-of-one said nothing excites her more than stepping outside of her comfort zone and pursuing unlikely projects.
“When I was asked to do the Marvel film Captain America: The Winter Soldier, I couldn’t think of anything better than stepping out of Call The Midwife to work with a stunt team and beat up Robert Redford," she joked about starring in the 2014 film.
The star, who portrayed Councilwoman Pamela Hawley of the World Security Council in the film, added: "Admittedly, they wouldn’t let me stunt-punch him.
"They were worried I’d actually hit him, instead of missing him!”