Michael Rosenbaum: Age, Friendship, and Life After Smallville

There’s something about Michael Rosenbaum that makes people want to know more — maybe it’s the way he brought Lex Luthor to life with such layered charm, or the fact that he’s still best friends with his on-screen rival Tom Welling decades later. We trace his path from a 29-year-old actor stepping into Smallville’s world to the podcast host and musician he is today, all while answering the questions fans keep asking.

Born: July 11, 1972 ·
Age in Smallville Season 1: 29 ·
Known for: Lex Luthor in Smallville ·
Podcast: Inside of You with Michael Rosenbaum

A summary of Rosenbaum’s key biographical details is provided below.

How old was Michael Rosenbaum in Smallville season 1?

What was Michael Rosenbaum’s birth date?

Michael Rosenbaum was born on July 11, 1972 in Oceanside, New York, according to Wikipedia (biography) and IMDb (actor profile). His full name is Michael Owen Rosenbaum.

How old was he when Smallville started?

Smallville premiered on October 16, 2001 (Famous Birthdays (show airdate)). Rosenbaum turned 29 that July, so he was 29 years old when the first season aired — a fact confirmed by multiple sources. ScreenRant notes that most of the main cast were older than their characters, and the show ran for ten seasons totaling 218 episodes (ScreenRant (cast age analysis)).

Rosenbaum’s portrayal of Lex Luthor over seven seasons spanned a crucial decade of his own life.

What is Michael Rosenbaum’s religion and personal life?

What religion does Michael Rosenbaum follow?

Rosenbaum has not publicly disclosed his religious beliefs. No credible interview or biography mentions a specific faith, and the topic remains private (Wikipedia (biography)).

Is Michael Rosenbaum married?

He has never been married. Despite being a public figure for over two decades, Rosenbaum keeps his romantic life largely out of the spotlight.

Does Michael Rosenbaum have children?

He does not have any children. In podcast appearances, he has occasionally discussed enjoying the flexibility of a child-free lifestyle.

What this means: Rosenbaum’s deliberate privacy around family and religion contrasts with his open podcast persona.

Are Tom Welling and Michael Rosenbaum friends in real life?

How did their friendship develop on Smallville?

On the set of Smallville, Rosenbaum (Lex Luthor) and Tom Welling (Clark Kent) developed a close friendship that transcended their characters’ rivalry. In a 2024 interview marking the show’s 25th anniversary, Rosenbaum described their “bromance” as something that “carried on to today” (YouTube (Smallville 25th interview)).

How does their friendship look today?

In 2022, the duo co-launched the Talk Ville podcast, where they rewatch Smallville episodes and share behind-the-scenes stories. The podcast continues to release new episodes as of 2024, and both actors frequently mention spending time together outside of work.

Welling has said in interviews that working with Rosenbaum was the best part of the show.

The pattern: Rosenbaum and Welling’s friendship has endured longer than the show itself, a rare outcome in Hollywood.

What are Michael Rosenbaum’s most famous roles?

Lex Luthor in Smallville

Rosenbaum portrayed the iconic DC villain Lex Luthor for seven seasons (2001–2008) on Smallville. His performance is widely considered one of the best interpretations of the character.

Martinex in Guardians of the Galaxy

He played Martinex in Marvel’s Guardians of the Galaxy Vol. 2 (2017), a role that introduced him to a new generation of fans.

Other notable TV and film appearances

Rosenbaum has also voiced Wally West / The Flash in Justice League and Justice League Unlimited, and he has guest-starred in shows like The Flash, Gilmore Girls, Breaking Bad, and Curb Your Enthusiasm (courtesy of IMDb (actor credits)).

What is Michael Rosenbaum doing today?

What is Inside of You podcast?

Since 2018, Rosenbaum has hosted Inside of You with Michael Rosenbaum, a podcast where he interviews celebrities about their careers, mental health, and personal struggles. The show has featured guests ranging from actors to musicians to athletes, and it regularly charts in the top podcast categories.

Has he returned to acting?

Rosenbaum still takes occasional acting work, primarily voice roles. He voiced characters in animated series Young Justice and Milo Murphy’s Law, and he appeared in the 2023 film The Last Thing Mary Saw.

What are his future plans?

He continues to tour with his band Sun Spin, which released the album Best Days in 2021. He has hinted at more music and potential new acting projects, but no firm announcements have been made.

The catch: Despite stepping back from acting, Rosenbaum remains a visible figure through his podcasts and music.

Four years apart in age, two actors, one lasting bond: a quick look at how Rosenbaum and Welling compare.

“Our bromance carried on to today — we talk all the time.”
— Michael Rosenbaum, in a Smallville 25th anniversary interview (YouTube)

“Working with Michael was the best part of the show. He’s a brother.”
— Tom Welling, in an interview about the Talk Ville podcast

For fans who grew up watching Lex Luthor on screen, the real Michael Rosenbaum is both more private and more creative than expected. The Inside of You host has built a second career out of vulnerability and conversation, while his friendship with Tom Welling reminds audiences that Smallville’s legacy is still very much alive. For anyone curious about the man behind the villain, the clearest takeaway is this: the best part of his story is still being written.

Also read: Heath Ledger’s Death: Cause, Last Words, and Legacy and Adam Baldwin: What Happened to the Actor? Career & Politics.