Mia Farrow is fattening herself up to prepare for a three-week fast, planned to raise awareness of the plight of starving refugees in Sudan.
The actress will live off just water from the end of April, despite doctors fears she could cause irreversible damage to her body.
Farrow admits she's a "little bit" scared about the stunt, but has bulked up in a bid to help her body cope with 21 days without food - and she is looking forward to a last supper of "a fist full of aging chocolate Easter eggs".
The 'Rosemary's Baby' star tells People.com@ "I gained nine pounds. That is about as much as I could gain in a month because I know I am going to lose a fourth of my body mass.
"But that will quickly go. I am just eating fruit and vegetables this week and I am reading certain things and spending time with my kids, trying to be quiet, because among other things it is a very personal and spiritual journey.
"I'm taking vitamins this week, but when I wake up on Monday, April 27, it will be strictly water."
Farrow admits she may not last the full three weeks - because of her small frame: "I am going to try for three weeks. Given my weight, that may not come to pass. I am going to get my blood tested after two weeks and if there is organ damage, I will have to stop. But my goal is three weeks.
"I won't be able to go to the doctor at that point, someone is going to have to come to the house and give me a blood test."