Miranda Kerr says it is a "constant juggle" balancing her career and her family life.
The 34-year-old model is a busy woman but always makes time for her six-year-old son Flynn, who she has with her ex-husband Orlando Boom.
She said: "It's a constant juggle. But it has become easier with time and learning to prioritise and not overcommit myself. We have to remember it's okay to say no. I try and minimise my travel as much as possible. When you become a mom, the most important thing is your child, and you try to work everything in and around what is best for them.
"The first few months [and years] are a huge adjustment for any new parent, but I was lucky in some respects that my job has flexibility. I wasn't governed by working 9-to-5, so I could ease myself back into everything, and I had a supportive, respectful, and understanding team."
And Miranda - who tied the knot with Evan Spiegel earlier this year - says being a mother is her "biggest honour and joy".
She told MyDomaine: "There is nothing better than picking my son up from school and seeing his little face light up. It is joy and love in the purest form. I think the most challenging part is the responsibility of raising a child to be the best versions of themselves, to have courage, manners, and to be kind.
"Thinking back, the sleep deprivation for the first year was pretty challenging, but being a mother is my biggest honour and joy; the sleepless nights were well worth it."