Alan Thicke, Robin Thicke

Actor Alan Thicke (L) and his son, singer Robin Thicke, arrive at the opening of Jay-Z's USD 20 million 40/40 Club at The Palazzo Resort-Hotel-Casino December 30, 2007 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Jerry & Ben Stiller

Ben Stiller and Jerry Stiller attend the HELP HAITI benefiting The Ben Stiller Foundation and The J/P Haitian Relief Organization at the Urban Zen Center At Stephan Weiss Studio on February 11, 2011 in New York City. (Photo by Michael Loccisano/Getty Images)

James Brolin, Josh Brolin

Actor James Brolin, wife singer Barbra Streisand and actor Josh Brolin arrive at premiere of Warner Bros. "Jonah Hex" held at ArcLight Cinema's Cinerama Dome on June 17, 2010 in Hollywood, California. (Photo by Kevin Winter/Getty Images)

Kiefer Sutherland, Donald Sutherland

Canadian actor Kiefer Sutherland (R) poses with his father, actor Donald Sutherland (L), after being honored with the 2,377th Star on the Hollywood Walk of Fame, December 9, 2008 in Hollywood, California. AFP PHOTO / GABRIEL BOUYS

Kirk Douglas, Michael Douglas

Actors Kirk Douglas and Michael Douglas in the audience during the AFI Lifetime Achievement Award: A Tribute to Michael Douglas held at Sony Pictures Studios on June 11, 2009 in Culver City, California. (Photo by Frazer Harrison/Getty Images for AFI)

Ozzie Nelson, Ricky Nelson

Before there was Ozzy and Jack , there was Ozzie and Ricky. Ozzie and his wife gave us one of America’s most endearing sitcoms and institutions, The Adventures of Ozzie and Harriet. The show could be seen on our television sets from 1952 to 1966. During the show’s run and after, son Ricky was busy making hit records. In fact, over 53 of his songs made the Top 100 Billboard charts from 1957 and 1973. (credit: AP)

Rob Reiner, Carl Reiner

Actors/directors Carl Reiner (L) and his son Rob Reiner arrive at AARP Magazine's "10th Annual Movies For Grownups" Awards Gala at the Beverly Wilshire Hotel on February 7, 2011 in Beverly Hills, California. (Photo by Kevin Winter/Getty Images)

Beau Bridges, Lloyd Bridges, Jeff Bridges

A triple threat! Whether it’s Airplane!, Sea Hunt, The Fabulous Baker Boys or The Big Lebowski. This trio one way or another has been a shining star since Dad appeared in his first film in 1936! Now, 75 years later, it may be safe to say that nobody is a hotter commodity right now than Jeff. (credit: AP)

Will Smith, Jaden Smith

Actor Will Smith (L) poses with Jaden Smith (R) as they attend "The Karate Kid" film premiere at Le Grand Rex on July 25, 2010 in Paris, France. (Photo by Pascal Le Segretain/Getty Images)

Jason Ritter, John Ritter

LOS ANGELES - AUGUST 14: Actors John Ritter (R) with son Jason Ritter pose after winning an award for "8 Simple Rules For Dating My Daughter" in the best comedy category "5th Annual Family Television Awards" at the Beverly Hilton Hotel August 14, 2003 in Los Angeles. Ritter fell ill on the set of his sitcom, "8 Simple Rules..." on September 11, 2003 and died at Providence St. Joseph Medical center shortly after 10 p.m. The cause of death was a dissection of the aorta. (Photo by Carlo Allegri/Getty Images)

Gary Busey, Jake Busey

BEVERLY HILLS, CA - FEBRUARY 29: Actors Gary Busey (L) and son Jake Busey arrive at the 13th Annual Night of 100 Stars Oscar Viewing Black Tie Gala, February 29, 2004 at the Beverly Hills Hotel in Beverly Hills, California. (Photo by Giulio Marcocchi/Getty Images)

James Caan, Scott Caan

Actors James Caan and his son Scott Caan (R) arrive at the premiere of "Mercy" at the Egyptian Theater in Hollywood, California on May 3, 2010. AFP PHOTO / GABRIEL BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)

Charlie Sheen, Martin Sheen

LOS ANGELES, CA - AUGUST 27: Actors Charlie Sheen (L) and Martin Sheen present the award for Outstanding Supporting Actress in a Drama Series onstage at the 58th Annual Primetime Emmy Awards at the Shrine Auditorium on August 27, 2006 in Los Angeles, California. (Photo by Vince Bucci/Getty Images)

Tom Hanks, Colin Hanks

NEW YORK - MARCH 10: (L-R) Actors Tom Hanks and Colin Hanks attend The Cinema Society and Brooks Brothers screening of "The Great Buck Howard" at the Tribeca Grand Screening Room on March 10, 2009 in New York City. (Photo by Stephen Lovekin/Getty Images)