Today's entrepreneurs might seem to be getting younger, but that doesn't mean that success will only happen during your 20s.

A lot of famous people also had to struggle during their formative years before catching their lucky break. So if you've almost turned the big 3-0 and you're unsatisfied with your career achievements to date, look to these people for inspiration:

Julia Child - 36

Only learned to cook in her 30s. Was introduced to fine cuisine after moving to Paris with her husband, where she attended the famous Le Cordon Blue cooking school.

Harrison Ford - 35

After some minor success in film and then carpentry, he finally had his breakout role of Han Solo in “Star Wars” after being hired to build cabinets for director George Lucas.

Jeremy Renner - 38

Before “The Hurt Locker” and “The Avengers,” Jeremy Renner was just an actor taking small acting roles, while working as a make-up artist to make ends meet.

Connie Britton - 39

Following minor roles in things like “Sin City” and “24,” Connie’s big success came from portraying matriarch Tami Taylor in the critically acclaimed “Friday Night Lights,” which earned her two Emmy nominations.

Jane Lynch - 43

Got her big break in the mockumentary “Best in Show” starring opposite Jennifer Coolidge, a role she gained based on the director’s memory of her in a 90’s Frosted Flakes commercial.

Vera Wang - 40

This former competitive figure skater entered the fashion industry after missing out on making the USA team in 1968. It was only after she decided to design her first bridal gown for herself that her talents were recognized.

Tim Allen - 38

After years a struggling comedian, and a stint in jail, Allen caught a break by starring in the hit television show “Home Improvement.”

Sylvester Stallone - 30

Before he wrote and starred in “Rocky,” he only had $50 to his name when he moved to New York and slept in a New York Port Authority.

Colonel Sanders - 65

Had many jobs before he ever considered opening a restaurant. It was only after his first restaurant went bankrupt that he decided to cash his first retirement check and open up the first KFC.

Oprah Winfrey - 32

The former "Queen of All Media" started out on a failing morning show. She was so good at her job that they decided to name the show after her. And the rest as they say is television history.

J.K. Rowling - 32

After being rejected by 12 publishers, J.K. was able to publish Harry Potter and the Philospher’s Stone in 1997.

Samuel L. Jackson - 45

With such a universally successful career, it’s hard to believe that Jackson was in his 40s by the time he got his big break in “Pulp Fiction”.

Dustin Hoffman - 30

Began his career at the Pasadena Playhouse before moving to New York. Had some small roles in off-Broadway shows before playing a high school graduate 12 years his junior in “The Graduate”.

Melissa McCarthy - 40

Before her titular role in “Bridesmaids,” she was the super sweet and loveable Sookie St. James for seven seasons on “Gilmore Girls.”

Kathy Bates - 40

Worked gradually on stage and on screen early in her career. Success only came after she was cast as the crazy lady in the thriller “Misery”.

Alan Rickman - 36

Alan Rickman actually ran a graphic design company with his friends before giving it up to pursue acting. His career sky-rocketed after his role of Hans Gruber in “Die Hard.”

Jon Hamm - 36

Spent his twenties and thirties as a struggling actor in Los Angeles and waited tables on the side. True success came after he was cast as Don Draper on “Mad Men” in 2007.

Gene Hackman - 37

Worked as field radio operator in the United States Marine Corps before landing his breakout role playing real life Buck Barrow in “Bonnie and Clyde.”

Morgan Freeman - 34

Seems impossible, but even the great Morgan Freeman had to struggle to make a name for himself in the acting world. It wasn’t until “The Electric Company” when he was 34 than Freeman became a household name.

Lucille Ball - 40

After a couple of B-movie roles and stage productions, Lucille finally found her calling with the hit series “I Love Lucy.”