She admitted her ‘heart literally aches’ when she has to leave her daughter to go to work.

And sharing her love two years on, Serena Williams took to social media on Sunday to wish Alexis Olympia Ohanian, Jr. a happy birthday.

The 37-year-old doting mom shared a tender shot from the first moment she laid eyes on her bundle of joy.

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Two years ago: Serena Williams shared a sweet family photo from her daughter’s birth on Sunday to commemorate her second time around the sun

‘The last 2 years have been my greatest accomplishment,’ she captioned.

Serena was seen in the hospital bed with all the medical wires and equipment still set up following her C-section.

Her husband, Alexis Ohanian, 36, gave her a kiss on the forehead while staring directing into their daughter’s eyes.

Important message: The Reddit founder also shared a sweet photo on one of their first moments, using his caption to push for paid family leave

Family =: Serena and Alexis frequently share photos with their daughter, Alexis Olympia Ohanian

The Reddit founder also shared a sweet photo on one of their first moments, using his caption to push for paid family leave.

How has it already been two years? Happy cake day,’ he began.

‘Thank you for being the greatest thing we’ve ever done. And thank you for teaching me that every parent in the US deserves those first months with their newborn. I’m a better business leader because of it. #PaidFamilyLeave.

The image saw the family member’s hands all intertwined as a trio for the first time.

Not easy: The doting parent’s tribute posts comes after Serena revealed on Friday that Olympia gets ‘upset’ when she has to leave for work which makes her ‘heart literally ache’

Not easy: ‘I’ve been missing her the last few nights when I play. In the beginning she would really be upset when I left. And now she’s a little bit better. I think I’m a little more upset

And while it is Olympia’s birthday, mom Serena is gearing up for a tennis match against Petra Martić later this morning as part of the US Open.

It is unsure if the family will later celebrate the toddler’s birthday as they are open Jehovah’s Witness followers.

The doting parent’s tribute posts comes after Serena revealed on Friday that Olympia gets ‘upset’ when she has to leave for work which makes her ‘heart literally ache.’

‘I actually prefer playing in the day because I get to go home and see my 𝚋𝚊𝚋𝚢,’ she added to Forbes.

Balance: Serena says that while it’s tough not always being there for her daughter, she says it’s ‘good for her’ to be able to work

Mom first: ‘I actually prefer playing in the day because I get to go home and see my 𝚋𝚊𝚋𝚢,’ she added to Forbes

‘I’ve been missing her the last few nights when I play. In the beginning she would really be upset when I left. And now she’s a little bit better. I think I’m a little more upset.

‘But at the same time, she definitely still takes it a little hard. She’s still super young.’

Serena says that while it’s tough not always being there for her daughter, she says it’s ‘good for her’ to be able to work.

She continued: ‘Sometimes my heart literally aches when I’m not around her.

‘But, you know, it’s good for me, I guess, to keep working and just — to all moms out there that it’s not easy. It’s really kind of painful sometimes. Sometimes you just have to do what you have to do.’

Serena and Alexis married in November 2017 in New Orleans with guests including; Beyonce, Anna Wintour, Kelly Rowland and Kim Kardashian.

The beauty revealed she was 20 weeks pregnant on Snapchat in April 2017, meaning she had won the Australian Open when she was eight weeks pregnant.

Olympia was born on September 1, 2017.

High profile couple: Serena and Alexis married in November 2017 in New Orleans with guests including; Beyonce, Anna Wintour, Kelly Rowland and Kim Kardashian