Arnold Schwarzenegger, 74, received birthday wishes from his children on Instagram on Friday.

His daughter Katherine Schwarzenegger shared a series of nostalgic photos from her childhood.

HAPPY BIRTHDAY, DADDY! I adore you so much and can’t wait to celebrate you! ‘Have the best day ever!’ she exclaimed.

‘Schnitzel, schnapps and stogies’: Arnold’s son Joseph Baena, who has followed his footsteps into bodybuilding and acting, posted a more recent picture to wish his father a happy birthday

Arnold Schwarzenegger’s children, including his daughter Katherine, flooded him with loving messages on Instagram for his 74th birthday Friday.

Katherine posted a lovely photo of herself sitting on horseback with her father, who gave her bunny ears.

One of the photos shows Katherine celebrating her first birthday and sharing a cake with both of her parents, Arnold and his now-estranged wife Maria Shriver.

She also supplied a photo of Arnie with both his daughters, Katherine and her younger sister Christina.

Arnold’s son, Joseph Baena, who has followed in his father’s footsteps in bodybuilding and acting, shared a more recent photo to wish him a happy birthday.

Heartwarming: Katherine marked the special day by uploading a string of throwback pictures dating back to when she was growing up

Happy birthday, daddy! I adore you so much and can’t wait to celebrate you! Have the greatest day ever!!’ She gushed!

The dynamic duo sat next to each other at a restaurant and clinked their breakfast beverages: tea or coffee for Joseph and green juice for Arnie.

‘Happy birthday, Dad! I hope your pump was juicy and may your day be filled with lots of schnitzel, schnapps and stogies!!!’ Joseph gushed.

Arnie, known for his love of cigars, once stated that he misses “juicy wiener schnitzel” from his native Austria.

Arnie and his estranged wife Maria Shriver have four children: Katherine, 31, Christina, 29, Patrick, 27, and Christopher, 23.

Goofing around: Katherine included a heartwarming snap of herself sitting on horseback next to her father who sweetly gave her bunny ears

The way they were: One of the pictures showed Katherine celebrating her own first birthday and sitting at her cake with both parents – Arnold and his now estranged wife Maria Shriver

She also supplied a snapshot of Arnie with his kids, Katherine and Christina.

Maria left Arnold a decade earlier after discovering that he had fathered Joseph with the family’s housekeeper, Mildred Baena.

Although they have been separated since 2011, and he is currently seeing blonde physical therapist Heather Milligan, 46, their divorce has not been formalized.

As Arnie celebrated his birthday on Friday, he received a nice letter from Patrick, who co-starred with Bella Thorne in the failed film Midnight Sun.

Patrick shared an incredible video of Arnold hauling a massive weight and then saying, with a sigh, ‘I needed that.’

Proud: As Arnie’s birthday wore on this Friday he also got a sweet message from Patrick, who starred alongside Bella Thorne in the flop movie Midnight Sun

Wow: Patrick posted an astonishing video of Arnold pulling an enormous weight and then declaring with a sigh: ‘I needed that’

Patrick commented, “I have no idea how you’re 74 today and still pulling this weight.” I honestly hope I’ll be half as strong physically and intellectually when I’m your age.

‘Happy Birthday, pops! I can’t believe you became a grandfather this past year. Patrick said in his caption, ‘Can’t wait to see what happens this year!’ Katherine and her husband Chris Pratt welcomed a daughter named Lyla last year.

‘Also, I have no idea how you’re 74 today and still pulling this weight. I sincerely aspire to be half as physically and psychologically strong as you when I reach your age. PS: Wait to the end.’

Arnold himself was photographed on his birthday taking some exercise on one of his regular bike rides in sunny Los Angeles.

He chose a path near the beach in Santa Monica, covering up and accessorizing with butterfly sunglasses.

Fit as a fiddle: Arnold himself was spotted on his birthday getting in a bit of exercise with one of his regular bike rides in sunny Los Angeles

On the move: He opted for a route by the beach in Santa Monica, masking up and accessorizing with a pair of butterfly sunglasses