It’s Patrick Duffy’s 67th Birthday — See the Cast of ‘Step by Step’ Then and Now!

Patrick Duffy (Frank Lambert)

Though Patrick, 67, is most known for playing Bobby Ewing on Dallas and Frank Lambert on Step by Step, the actor went on to do voice-over work on shows including Family Guy and Justice League. In 2012, he reprised his role as Bobby Ewing in TNT's reboot of the hit show Dallas, which went off the air in 2014.

Christine Lakin (Alicia "Al" Lambert)

Following her days playing Al on Step by Step, Christine, now 37, appeared in a plethora of films including Veronica Mars, Valentine’s Day, Parental Guidance and The Hottie & The Nottie.

Suzanne Somers (Carol Foster Lambert)

After moving on from Step by Step, the 69-year-old actress — who was previously known for playing Chrissy Snow on Three's Company — portrayed Sheriff Hildy Granger on the television series She's The Sheriff and appeared on Season 20 of ABC's Dancing with the Stars.

Christopher Castille (Mark Foster)

The youngest of the Foster children — who now works as a high school history teacher — is also well-known for starring in the Beethoven films. The 35-year-old former actor also voiced Eugene Horowitz on Hey Arnold!

Staci Keanan (Dana Foster)

The 40-year-old actress — who was also known for her part on My Two Dads — landed small roles in the films You Again and Hidden Secrets after appearing on Step by Step.

Sasha Mitchell (Cody Lambert)

The 48-year-old actor — who also played appeared on Dallas prior to Step by Step — went on to have a limited acting career, appearing in Dickie Roberts: Former Child Star and the 2013 film Cyborg Nemesis.

Angela Watson (Karen Foster)

After playing Karen on Step by Step, the actress, now 40, found out her own family had mismanaged her earnings from the show. She later founded Child Actors Supporting Themselves (CAST) in 2000 to help young actors learn how to manage their finances.

Brandon Call (J.T. Lambert)

Following a tragic accident in 1996 — that resulted in Brandon, now 39, being shot in both arms — the former child star retired from acting.

Josh Bryne (Brendan Lambert)

After abruptly leaving Step by Step before the final season, the 31-year-old gave up acting. According to his Myspace profile, he now works at a Renaissance Fair.

The End!