X Factor singer Mary Byrne, beauty expert Triona McCarthy, chef Gary O'Hanlon, social media influencer James Patrice and singer Kayleigh Cullinan are starting their Celebrity Operation Transformation plan today.
You can join in and follow the leaders and their food plan on the OT website here.
Whether you're following Mary, Gary, James, Triona or Kayleigh Cullinan, the OT food plan has great recipes to try out at home. You can get the shopping list for week one here.

The Main Meals
Day 1: Monday, 28th of August - Chicken Puttanesca

Day 2: Tuesday, 29th of August - Nutty Fried Rice Bowl

Day 3: Wednesday, 30th of August - Fish 'n' Chips

Day 4: Thursday, 31st of August - Spinach, squash and chicken salad

Day 5: Friday, 1st of September - Seared salmon and lentil veg sauté

Day 6: Saturday, 2nd of September - Pasta Siciliana

Day 7: Sunday, 3rd of September - Fillet steak, fried mushroom and creamy spinach

Celebrity Operation Transformation will be back on RTÉ One on Wednesday, September 6, 2017.