Katherine Heigl wasn’t a fan of working out prior to shooting Knocked Up. She had to get in shape for the movie so hired celebrity personal trainer Harley Pasternak (who has worked with Halle Berry, Jessica Simpson and Sheryl Crow) she admits she is loving her new figure. "I’m in the best shape I’ve ever been in."

If you saw the movie you would have noticed how toned Katherine has become. Her main motivatinon for getting in shape was the revealing sex scene with her co star. It only took her six weeks of training to get in shape! She worked out 3-5 times a week, alternating between cardio and circuit training (session times varied between 25-50 minutes). Harley Pastermak also had her jumping rope and lifting weights on set outside her caravan.

Pastermak on Katherine Heigls Body: "Katherine had a beautiful body, but it had never been toned," She also followed his famous five factor diet which involves eating five meals a day. She had a cheat meal once a week which helped her keep her diet on track. Similar to Jessica Biel’s Cheat Day diet! (What’s a cheat day diet?)

According to people magazine here is Katherine Heigl’s exact meal plan and workout schedule!

What Does Katherine Heigl Eat?

Breakfast: French toast with ricotta pillows
Mid-morning snack: A mixed-berry shake
Lunch: TexMex salad with chicken and black beans
Afternoon snack: Hummus crudite
Dinner: Sea Bass with brown rice and edamame

How Does Katherine Heigl Workout?

5 minutes of jump-roping, jogging, or stair-climbing for a cardio warm-up.
A circuit of 4 sets each of the following:
• 25 dumbbell flies
• 25 lunges
• 25 low-body crunches
Followed by:
• 5-25 minutes of cardio running, elliptical training, stair-climbing or biking, with the last five minutes working as a cool-down period.