Shailene Woodley had a tough time preparing for new film **Adrift**.
The 26-year-old actress plays real-life yachtswoman Tami Oldham Ashcraft, who was stranded at sea.
Us Magazine reports that the actress ate fewer than 400 calories per day to look like she was starving.
?For the last two weeks I had a can of salmon, some steamed broccoli and two egg yolks every day ? 350 calories. It was f-ing miserable." Shailene Woodley
The film follows Woodley?s character and her fiancé (Sam Claiflin), as they encounter Hurricane Raymond.
**Adrift** is in theaters now.