Ashlee Simpson poses with mother in law Diana Ross as she and

Ashlee Simpson poses with mother-in-law Diana Ross as she and Evan Ross spend Halloween with kids

Ashlee Simpson poses with legendary mother-in-law Diana Ross as she and husband Evan Ross spend Halloween with their children

Ashlee Simpson took to Instagram after Halloween to share a photo from her family’s celebration of the holiday.

The mother-of-three, 38, wore a light blue bob-cut wig as she posed with husband Evan Ross, 34, and legendary mother-in-law Diana Ross, 78.

Evan also shared the outtake on their respective accounts with the caption: “HAPPY LATE HALLOWEEN.”

Ashlee Simpson took to Instagram after Halloween to share a photo from her family's celebration of the holiday

Ashlee Simpson took to Instagram after Halloween to share a photo from her family’s celebration of the holiday

Simpson, who made her name as a pop musician in the early 2000s, matched dark lipstick with her thick hair.

She wore a sleeveless multicolored turtleneck and deep blue loose-fitting pants while holding her youngest child, Ziggy, two, on her hip.

The blonde beauty and her boyfriend also share daughter Jagger, seven, and she shares son Bronx, 13, with ex-husband Pete Wentz.

The family posed outdoors with a gorgeous pink and blue sky providing a backdrop for the sunset.

Family: The blonde beauty and her boyfriend share daughter Jagger, seven, son Ziggy, two, and Ashlee also has son Bronx, 13, with ex-husband Pete Wentz

Family: The blonde beauty and her boyfriend share daughter Jagger, seven, son Ziggy, two, and Ashlee also has son Bronx, 13, with ex-husband Pete Wentz

Diana joined the family photo op in black leggings and a black shirt underneath a long sweater.

Her dark, voluminous locks framed her face as she stood next to Evan, who was dressed up as a miner for the fun and spooky day.

The couple’s daughter wore a blue wig like her mother, but hers was much longer and she paired it with metallic silver trousers.

A few days ago, Ashlee, whose older sister is Jessica Simpson, appeared online to celebrate Ziggy’s birthday.

Birthday girl: Days ago, Ashlee, whose older sister is Jessica Simpson, appeared online to celebrate Ziggy's birthday Delicious!  She gave her son a Halloween birthday cake

Birthday girl: Days ago, Ashlee, whose older sister is Jessica Simpson, appeared online to celebrate Ziggy’s birthday

Uploading snaps from the tot’s special day, she wrote in the caption: “Happy Birthday Ziggy Blu can’t believe you’re 2! We love you so much.’

She and her brood posed together on the steps outside while huddled with their baby boy on her hip.

She wore a headband with two bouquets of flowers arranged on it that mimicked space buns.

Her daughter dressed in the same blue suit she wore with her grandmother in the photo.

Another upload: The LaLa hitmaker took to social media to share a solo photo of her in a black dress

Another upload: The LaLa hitmaker took to social media to share a solo photo of her in a black dress

And just yesterday, the LaLa hitmaker took to social media to share a solo photo of herself in a black dress.

It was captured at a recent night out with her spouse, whom she married in 2014.

Simpson looked sensual in a sequined black dress with an asymmetric hemline that exposed her legs.

She wore sexy shiny black open toe shoes with super high heels.

Husband and wife: Ashlee recently enjoyed a night out with Evan, who she tied the knot with in 2014

Husband and wife: Ashlee recently enjoyed a night out with Evan, who she tied the knot with in 2014