Pregnant Serena Williams cradles her baby bump in a red sundress as she poses with daughter Olympia, five, next to a large tree

Serena Williams dropped in on Instagram Wednesday to share two new photos with her 16.6 million followers.

The 41-year-old tennis superstar — who revealed she is pregnant with her second child on the Met Gala red carpet last month — donned a casual red sundress as she posed with daughter Olympia, age five.

The retired athlete cradled her burgeoning baby bump in one of two photos, which saw the mommy-daughter duo outside enjoying nature.

Serena donned sporty black Louis Vuitton sunglasses and Olympia, born Alexis Olympia Ohanian, Jr, wore a light pink short-sleeved frock.

Williams, who is married to investor Alexis Ohanian, quoted Green Day’s 1997 hit song Good Riddance in the caption.

She wrote, ‘“So take the photographs and still frames in your mind,”‘ a line from the guitar-driven ballad.

Situated on the branch of one of the trees surrounding Serena and her little one was a black Green Day baseball cap.

The superstar tagged the band in one photo, as well as her daughter’s personal Instagram account.

Two weeks ago Serena shared a cute YouTube video that showed her and her husband telling Olympia that she is going to be a big sister.

The clip, titled Olympia’s Surprise, began with Serena showing the camera a close-up of a positive pregnancy test as she revealed she’s ‘super happy.’

Serena then hilariously noted that although Olympia did not know she was pregnant, she had called her mom ‘fat’ and was ‘stressed out’ by her weight gain.

Later in the video Serena and Alexis shared the news with their daughter, who was overjoyed and began running and shrieking in excitement.

Serena donned a Gucci sweater and blazer as she started the video by chatting to the camera, vlog style.