Gwyneth Paltrow received the sweetest Mother's Day card from her son, Moses Martin. Credit: Jason Merritt/Getty Images

Gwyneth Paltrow's little guy is a fan of Goop! At just 9 years old, Moses Martin knows the way to his mom's heart: Gush over how great her Goop lifestyle website is. To celebrate Paltrow, 42, for Mother's Day 2015, Moses did just that in an adorably handwritten holiday card Paltrow later posted to Instagram.

"Dear Mom: You are wonderful because you always help me feed and play with the bunnies. My favorite part of the day is when we watch the bunnies turn around in the garden. Thank you for teaching me how to start a website, I love your website and I wanted to have one too. Love, Momo," the boy's card read.

Paltrow — who shares Moses and Apple, 10, with ex Chris Martin — posted the "heartbreak" emoji when sharing her card with fans Sunday after brunching with her kids and their dad at Santa Monica's waterfront Ivy restaurant.

The actress has said she wouldn’t mind if her kids eventually take over Goop, the lifestyle and e-commerce site she launched in 2008, if they're interested. "I very much want Goop to be its own stand-alone brand. I know at this point it's inextricably me but we are a team of amazing people who bring incredible ideas to the site — it's not only me. My dream would be that in 20 years people would sort of recollect that I had something to do with it...and my involvement would be less essential," Paltrow told Bloomberg Television's Stephanie Ruhle in March.

"I never wanted to do a proprietary brand," she continued of the company, which is often criticized for its crazy-opulent gift ideas and over-the-top home entertaining advice. "I wanted it to be its own thing that my children can run one day if they want to!"