Tennis star Serena Williams is leading the charge when it comes to parenting in Hollywood. Picture: AP

Tennis star Serena Williams is leading the charge when it comes to parenting in Hollywood. 

She is part of a group of celebrities who are now coming clean on the struggles faced by new moms and what it's like being a parent under the spotlight.

In her new documentary series called Being Serena, she gives a behind-the-scenes glimpse into her life. Produced by HBO Sports and IMG’s Original Content group, it chronicles Williams at a pivotal moment in her personal and professional life.

"When I realised that I was pregnant, I was 'oh my God', how am I going to play," she says in the trailer. "I put so much pressure on myself. I want to make sure that I'm the best."

Williams has made no secret of her difficult pregnancy, and even elluded to the the fact that she was at death's door after the birth of baby Alexis Olympia.

The 36-year-old and her husband Alex Ohanian welcomed daughter Alexis Olympia Ohanian Jr. 11 months ago and she has admitted that she often feels she is not doing enough for her child.

In an emotional Instagram post, she wrote: "Last week was not easy for me. Not only was I accepting some tough personal stuff, but I just was in a funk. Mostly, I felt like I was not a good mom.

"I read several articles that said postpartum emotions can last up to 3 years if not dealt with. I like communication best. Talking things through with my mom, my sisters, my friends let me know that my feelings are totally normal. It's totally normal to feel like I'm not doing enough for my baby.

"I work a lot, I train, and I'm trying to be the best athlete I can be. However, that means although I have been with [my daughter] every day of her life, I'm not around as much as I would like to be. Most of you moms deal with the same thing. Whether stay-at-home or working, finding that balance with kids is a true art. You are the true heroes. I'm here to say: if you are having a rough day or week-it's ok-I am, too!!! (sic)."