20 famous celebrity siblings you didn't know about 

20 famous celebrity siblings you didn
20 famous celebrity siblings you didn't know about | Image Source: All Original Sources

15. Siblings - Sylvester and Frank Stallone

Sylvester and Frank Stallone | Image Source: Getty image library
Sylvester and Frank Stallone | Image Source: Getty image library

Instantly known for his long career, which began in the '70s and gained popularity with his part as Rocky (1976), Stallone has worked consistently for 30 years. He's created the Rocky sequels and his part as Rambo is the foundation of his career.

On the other hand, you might not recognize Frank’s face, but in reality, little brother Frank has had a good amount of success on his own. His song, "Far from Over", was featured in Staying Alive (1983), and reached number 10 on the charts. He has made nine solo albums.

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Edited by Zainab Shaikh