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.

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

Sweet: The 41-year-old tennis superstar donned a casual red sundress as she posed with 5-year-old daughter Olympia

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.

Big sister: Serena told her daughter that she is going to be a big sister in an adorable Youtube video posted to her channel

Pure joy: The athlete was joined by her husband, investor Alexis Ohanian

‘Olympia does not know right now that I am pregnant, but she did call me fat, and then she got really, like, stressed out,’ she told the camera.

‘She was like “Mommy, you’re fat,”‘ Serena shared while mimicking Olympia’s distraught voice.

‘I tried not to take it personal, ’cause I’m like super into fitness, but I’m like, “uhh, am I?”

‘I’m really, really excited to see her reaction,’ she added.

The next clip saw the family sitting on a couch, with Olympia looking cute in floral pajamas as she sat between her parents.

‘Remember how you’ve been praying for a little sister or brother?’ Serena asked her.

‘Well, we went to the doctor, and it turns out I’m not getting fat,’ Serena said as her husband laughed.

‘But I have a baby in my belly,’ she revealed.

‘What, are you kidding me?’ Olympia asked excitedly.

‘You’re going to be a big sister,’ Alexis told her.

An overjoyed Olympia then gave her mom a hug, before Serena asked if she wanted to see her belly.

The Michigan-born star unbuttoned her jeans and raised her blue t-shirt to reveal her baby bump.

At the sight of Serena’s belly, Olympia jumped off the couch and began to scream in excitement while making rounds around the couch.