Serena Williams is set to play in her first Women's Tennis Association event since giving birth to Alexis Olympia Jr.

And the tennis pro's husband Alexis Ohanian surprised her with four billboards alongside the 1-10 freeway into Palm Springs days before the tournament's kickoff.

The billboards, which read 'Greatest Momma Of All Time,' also featured oversized images of their five month-old daughter with Serena, 36.

Husband of the year: Serena Williams' husband Alexis Ohanian surprised her with four billboards alongside the 1-10 freeway into Palm Springs

The incredibly sweet tribute was seen by Serena as she made her way to the 2018 BNP Paribas Open in Indian Wells, California.

The first AdQuick Billboard featured their daughter staring straight at the camera with the word 'Greatest.'

The second one had the text 'Momma' next to a picture of Serena cradling Alexis in her arms.

Gushing: The first AdQuick Billboard featured their daughter staring straight at the camera with the word 'Greatest

Adorable: The billboards, which read 'Greatest Momma Of All Time,' also featured oversized images of Alexis Jr. and Serena

Wow: The third billboard had 'Of All Time' emblazoned on it with an adorable picture of their daughter

The third billboard had 'Of All Time' emblazoned on it with an adorable picture of their daughter.

The final and fourth one featured the tennis champion looking at the camera as she held their baby with the message: 'Serena Williams G.M.O.A.T. - Alexis Jr and Sr.'

Alexis, co-founder of Reddit, shared his surprise to his Instagram followers.

Family is everything: Serena Williams welcomed daughter Alexis Olympia Ohanian Jr. on September 1, 2017

It's go time: The BNP Paribas Open is her first event since welcoming Alexis, according to The Bleacher Report

Happily ever after: Serena and Alexis married in a Beauty and The Beast themed wedding on November 16 in New Orleans, Louisiana; pictured May 1 at the Met Gala in NYC

He captioned it: 'These just went up alongside I-10 into Palm Springs. @OlympiaOhanian & I wanted to welcome her back to tennis. Designed them myself, with some help from Jr. #GMOAT.'

Serena and Alexis welcomed daughter Alexis Olympia Ohanian Jr. on September 1, 2017.

The BNP Paribas Open is her first event in the WTA Tour circuit since welcoming Alexis, according to The Bleacher Report.

The landscape: The billboards had been set up near a group of several windmills

Cozy: The second one had the text 'Momma' next to a picture of Serena cradling Alexis in her arms

Inspo?: The idea of spreading one message across multiple rural roadside billboards was reminiscent of pending Best Picture Oscar-nominee Three Billboards Outside Ebbing, Missouri

The tournament kicks off on March 5 in Indian Wells.

She has no ranking since she hasn't played a singles match since her Australian Open win a year ago but is using a protected ranking of one in order to enter the WTA tournament.

Serena last played in the WTA Tour at the Australian Open in January 2017, when she was two months pregnant; she won the tournament, marking her 23rd Grand Slam singles title.

Vista: The billboards stood in front of a gorgeous view of the nearby mountains

Wrapped up: Her child was draped in a baby sling on the 'MOMMA' billboard

Sweet sentiment: The final and fourth one featured the tennis champion looking at the camera as she held their baby with the message: 'Serena Williams G.M.O.A.T. - Alexis Jr and Sr'

Serena played alongside sister Venus Williams in a doubles match for Team USA at the Fed Cup in mid-February; they lost in the first round against Demi Schurrs and Lesley Kerkhove.

She played an exhibition game in December against Jelena Ostapenko in Abu Dhabi.

In January, Serena withdrew from the Australian Open, after stating she didn't feel physically ready.

Addendum: The acronym on the final billboard was an expanded version of the popular abbreviation G.O.A.T., meaning Greatest Of All Time

During her interview with Vogue magazine after welcoming Alexis Jr., Serena revealed that she dealt with two months of post-labor complications, including small blood clots in her lungs as well as her c-section wound re-opening.

According to the magazine, when they opened the wound they found hematoma, which in turn flooded her abdomen.

Serena and Alexis married in a Beauty and The Beast themed wedding on November 16 in New Orleans, Louisiana.