Preemptive strike! Katherine Schwarzenegger 作品 off the cake as she 攻撃する，衝突するs the gym before her birthday bash

By Helen Zhao for MailOnline

Published: | Updated:

She celebrated her 25th birthday on Saturday.

And perhaps Katherine Schwarzenegger was 準備するing for all the goodies she was about to 消費する as she 攻撃する，衝突する the gym in Brentwood, Los Angeles on Friday.

The daughter of Arnold Schwarzenegger and Maria Shriver 最高潮の場面d her pert posterior in dark grey leggings paired with a pale blue hoodie.

Getting a workout: Katherine Schwarzenegger?hit the gym in Brentwood, Los Angeles on Friday

Getting a workout: Katherine Schwarzenegger?攻撃する，衝突する the gym in Brentwood, Los Angeles on Friday

A make-up 解放する／自由な Katherine sported neon pink sneakers and carried a chic purse, with her hair swept up in a high bun.

She appeared to be chatting with a friend in the distance, bursting into laughter.

The next day, Katherine celebrated her 25th birthday ? the same day that Taylor Swift rang in hers.

She Instagrammed a photo with several of her friends, 令状ing, ‘広大な／多数の／重要な way to の近くに the 一時期／支部 of 24! Hi 25 let's do this!’

Ready to gorge on cake? She was perhaps preparing for all the goodies she was about to consume on Saturday for her 25th birthday
Ready to gorge on cake? She was perhaps preparing for all the goodies she was about to consume on Saturday for her 25th birthday

Ready to gorge on cake? She was perhaps 準備するing for all the goodies she was about to 消費する on Saturday for her 25th birthday

Gym chic: The daughter of Arnold Schwarzenegger and Maria Shriver highlighted her pert posterior in dark grey leggings paired with a pale blue hoodie

Gym chic: The daughter of Arnold Schwarzenegger and Maria Shriver 最高潮の場面d her pert posterior in dark grey leggings paired with a pale blue hoodie

Katherine 株d another image with a friend of hers, 令状ing, ‘Happy birthday to my bestie and the most beautiful blonde bombshell @jess_kuuuh !

‘We've 株d our Bday for 25 years and I couldn't be happier to call you my twin and my bestie! Love you!’

Mom Maria Shriver, 59, made several 噴出するing 尊敬の印s to her oldest daughter, tweeting a photo of them together, with the caption: ‘She made me a mother for the 1st time 25 years ago.?

Fancy footwear: A make-up free Katherine sported neon pink sneakers and carried a chic purse, with her hair swept up in a high bun
Fancy footwear: A make-up free Katherine sported neon pink sneakers and carried a chic purse, with her hair swept up in a high bun

Fancy footwear: A make-up 解放する／自由な Katherine sported neon pink sneakers and carried a chic purse, with her hair swept up in a high bun

Festive! On Saturday, Katherine Instagrammed a photo with several of her friends, writing, 'Great way to close the chapter of 24! Hi 25 let's do this!'

Festive! On Saturday, Katherine Instagrammed a photo with several of her friends, 令状ing, '広大な／多数の／重要な way to の近くに the 一時期／支部 of 24! Hi 25 let's do this!'

BFF: The brunette beauty shared another image with a friend of hers, writing, 'Happy birthday to my bestie and the most beautiful blonde bombshell @jess_kuuuh !'

BFF: The brunette beauty s hared another image with a friend of hers, 令状ing, 'Happy birthday to my bestie and the most beautiful blonde bombshell @jess_kuuuh !'

‘Happy Birthday @KSchwarzenegger! I love you to the moon and 支援する’

The TV 特派員 追加するd with another photo: ‘Look at this beautful (sic) young woman-25 years ago @KSchwarzenegger was born. Lucky world lucky me & anyone who 会合，会うs her’

She also 株d a flashback photo of Katherine as a young girl, 令状ing: ‘It goes sooo 急速な／放蕩な. Happy 25 Birthday @KSchwarzenegger please bring this look 支援する’

Mommy and me! Mom Maria Shriver, 59, made several gushing tributes to her oldest daughter, tweeting a photo of them together, with the caption, 'She made me a mother for the 1st time 25 years ago...'

Mommy and me! Mom Maria Shriver, 59, made several 噴出するing 尊敬の印s to her oldest daughter, tweeting a photo of them together, with the caption, 'She made me a mother for the 1st time 25 years ago...'

Adorable: The mother-of-four also shared a flashback photo of Katherine as a young girl, writing, 'It goes sooo fast. Happy 25 Birthday @KSchwarzenegger please bring this look back'

Adorable: The mother-of-four also 株d a flashback photo of Katherine as a young girl, 令状ing, 'It goes sooo 急速な／放蕩な. Happy 25 Birthday @KSchwarzenegger please bring this look 支援する'

Finally, Maria tweeted an image of Katherine smiling 概して while 持つ／拘留するing her cake and balloons, with the caption: ‘25 25 25!! Celebrating this gorgeous young woman @KSchwarzenegger’

Younger brother Patrick, 21, 株d a photo of him and big sis, 令状ing: ‘Happy birthday to the best sista evaaaaa. Love you@katherineschwarzenegger’

Katherine also has younger siblings Christina, 23, and Christopher, 17.

Birthday girl: Finally, Maria tweeted an image of Katherine smiling broadly while holding her cake and balloons, with the caption, '25 25 25!! Celebrating this gorgeous young woman @KSchwarzenegger'

Birthday girl: Finally, Maria tweeted an image of Katherine smiling 概して while 持つ／拘留するing her cake and balloons, with the caption, '25 25 25!! Celebrating this gorgeous young woman @KSchwarzenegger'

Sibling love: Younger brother Patrick, 21, shared a photo of him and big sis, writing, 'Happy birthday to the best sista evaaaaa. Love you@katherineschwarzenegger'

Sibling love: Younger brother Patrick, 21, 株d a photo of him and big sis, 令状ing, 'Happy birthday to the best sista evaaaaa. Love you@katherineschwarzenegger'

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