Sofia Richie and her sister Nicole have a picnic for dad Lionel Richie’s 71st birthday

Sofia and Nicole Richie both flooded their Instagrams with photos and videos of their father Lionel Richie on Saturday to celebrate his 21st birthday.

Sofia, 21, joined her father for a picnic at his enormous Beverly Hills estate, while Nicole, 38, shared some joyous throwback photos of her dad in his prime.

Lionel’s son Miles Richie, 26, and his son-in-law Joel Madden, 41, also shared their tributes to their ‘mentor’ on social media.

Sister act: Sofia Richie, 21, joined forces with her sister Nicole, 38, to celebrate their father Lionel Richie’s 71st birthday on Saturday at his mansion in Beverly Hills

Sofia joined her father in person to enjoy a picnic on his massive lawn.

The model shared photos of Lionel relaxing in the shade of a large umbrella as he dined on an old-fashioned picnic basket with slots for real plates and glasses.

Later, the Easy singer goofed off and tried out different positions while being photographed holding the lawn umbrella.

Sofia contributed to the picnic by baking a vanilla and red velvet cake with chocolate frosting for the special occasion and shared a mouth-watering photo of it to her Instagram Stories.

One with nature: Sofia joined her father for a picnic on his lawn. The model shared photos of Lionel relaxing in the shade of a large umbrella as he dined on an old-fashioned picnic basket

One with nature: Sofia joined her father for a picnic on his lawn. The model shared photos of Lionel relaxing in the shade of a large umbrella as he dined on an old-fashioned picnic basket

Having a laugh: Later, the Easy singer goofed off and tried out different positions while being photographed holding the lawn umbrella

Having a laugh: Later, the Easy singer goofed off and tried out different positions while being photographed holding the lawn umbrella

Yum! Sofia contributed to the picnic by baking a vanilla and red velvet cake with chocolate frosting for the special occasion and shared a mouth-watering photo of it to her Insta Stories

Yum! Sofia contributed to the picnic by baking a vanilla and red velvet cake with chocolate frosting for the special occasion and shared a mouth-watering photo of it to her Insta Stories

The model also shot a short video of her father standing atop the steps at the entranceway to his home.

Lionel wore a casual white shirt with gray pants and gray tennis shoes and stood behind a railing adorned with silver balloons spelling, ‘happy birthday.’

She snorted with laughter when he flashed a peace sign from above.

‘Very nice, dad,’ she said.

Sofia capped off her posts with a clip of herself and her father trying to outdo each other by making funny faces at the camera.

Celebration: The model also shot a short video of her father standing atop the steps at the entranceway to his home

Celebration: The model also shot a short video of her father standing atop the steps at the entranceway to his home

Joking around: She snorted with laughter when he flashed a peace sign from above. 'Very nice, dad,' she said

Joking around: She snorted with laughter when he flashed a peace sign from above. ‘Very nice, dad,’ she said

Face/Off:

Face off: Sofia capped off her posts with a clip of herself and her father trying to outdo each other by making funny faces at the camera

MIA: Though Sofia caught a glimpse of Nicole's husband Joel Madden and her son Sparrow, 10, the Simple Life star wasn't anywhere to be in her posts

MIA: Though Sofia caught a glimpse of Nicole’s husband Joel Madden and her son Sparrow, 10, the Simple Life star wasn’t anywhere to be in her posts

Though Sofia caught a glimpse of Nicole’s husband Joel Madden and her son Sparrow, 10, the Simple Life star wasn’t anywhere to be in her posts.

Nicole focused on older moments in her Instagram posts, including a sweet snap of her wrapping her arms around his neck when she was only a child.

‘I [heart] you,’ she wrote, adding, ‘Happy Birthday Dad.’

The reality star also included a throwback photo of Lionel from his days delivering the funk as the lead singer of The Commodores.

A photo of a more recent vintage showed present-day Nicole with a look of mock shock as her father gave her a hug inside of West Hollywood’s Book Soup bookstore. 

Another short clip she shared from 2018 of Lionel aboard a boat proved that he likes to make dramatic poses when taking his birthday photo.

Too cute: Nicole focused on older moments in her Instagram posts, including a sweet snap of her wrapping her arms around his neck when she was only a child

Too cute: Nicole focused on older moments in her Instagram posts, including a sweet snap of her wrapping her arms around his neck when she was only a child

Loving daughter: 'I [heart] you,' she wrote, adding, 'Happy Birthday Dad.'

Loving daughter: ‘I [heart] you,’ she wrote, adding, ‘Happy Birthday Dad.’

'Yass Queen': The reality star also included a throwback photo of Lionel from his days delivering the funk as the lead singer of The Commodores

‘Yass Queen’: The reality star also included a throwback photo of Lionel from his days delivering the funk as the lead singer of The Commodores

Literature fans: A photo of a more recent vintage showed present-day Nicole with a look of mock shock as her father gave her a hug inside of West Hollywood's Book Soup bookstore

Literature fans: A photo of a more recent vintage showed present-day Nicole with a look of mock shock as her father gave her a hug inside of West Hollywood’s Book Soup bookstore

What a ham: Another short clip she shared from 2018 of Lionel aboard a boat proved that he likes to make dramatic poses when taking his birthday photo

What a ham: Another short clip she shared from 2018 of Lionel aboard a boat proved that he likes to make dramatic poses when taking his birthday photo

In addition to celebrating in person with his father-in-law, Nicole husband Joel shared his own tribute to Lionel on Instagram.

He posted an older black and white photo of the singer flanked by Nicole, Sparrow and her older daughter Harlow, now 12.

‘Happy Birthday @lionelrichie Legendary Father, Mentor and Friend. Thank you for always Being a rock in my life❤️,’ Joel captioned his post.  

Respect: In addition to celebrating in person with his father-in-law, Nicole husband Joel shared his own tribute to Lionel on Instagram

Respect: In addition to celebrating in person with his father-in-law, Nicole husband Joel shared his own tribute to Lionel on Instagram

Adding to the celebration was Lionel’s son Miles, who posted a moody photo featuring his father to his Instagram.

‘Happy Birthday to my idol, my mentor, and my best friend. Love you to the moon and back man. So proud of you and the stand up man that you are. I love you,’ he wrote.

Miles shared his own video from inside Lionel’s home and caught one of the birthday guests poking fun at him.

‘You look great for 96,’ they joked. 

Not a fan: Miles Richie shared his own video from inside Lionel's home and caught one of the birthday guests poking fun at him. 'You look great for 96,' they joked

Not a fan: Miles Richie shared his own video from inside Lionel’s home and caught one of the birthday guests poking fun at him. ‘You look great for 96,’ they joked