Brothers or Sisters who both

[Pea-n-Me]

Ron and Clint Howard

Penny and Garry Marshall

 

[tcufrog]

Jonas brothers. Have no idea what their names are. Too old.

 

[Imzadi]

Peter & Jane Fonda, (along with father, Henry & Peter's daughter, Brigit.)

 

[smiths02]

The Wahlbergs (Donnie and Marky Mark for music and acting, but apparently Paul and Robert are also actors)

 

[Imzadi]

Marlo Thomas, her brother Tony is a producer. Their sister, Terre, was a actress for a time. (Danny Thomas was, of course, their famous father, an actor and founder of the St. Jude's Children's Research Hospital.)

 

[Meriweather]

Owen and Luke Wilson

Jake Gyllenhaal, Maggie Gyllenhaal.

Zooey Deschanel, Emily Deschanel

Randy and Dennis Quaid

James Arness and Peter Graves

 

[Imzadi]

There is the Redgrave acting dynasty:

Michael Redgrave, (father of: )

Corin Redgrave, (see below)​

Lynn Redgrave,​

Vanessa Redgrave, (mother of: )​

|
V
Natasha Richardson,
Joely Richardson, (mother of: )​

|
V
Daisy Bevan​

Corin Redgrave was an actor in England. Father of:​

|
V
Jemma Redgrave, an actress in England​

 

[E&Cmom]

Kate and Oliver Hudson

 

[Cadiewampus]

Paul and Dizzy Dean
Paul and Lloyd Waner
Phil and Joe Niekro
Billy and Cal Ripken

 

[Julie's Haircut]

In hockey, there are SIX brothers from one family who reached the NHL.

The Sutters
Brent
Brian
Darryl
Duane
Rich
Ron

Several of their sons, Brandon, Brody, and Brett did as well.

 

[galaxygirl76]

Olivia de Havilland and Joan Fontaine, the only set of siblings to have won lead acting Oscars.

 

[FindingTheMouse]

Wayne, Keith and Brent Gretzky

Robert and Richard Sherman

 

[E&Cmom]

Deleted as already mentioned

 

[snappy]

The Neville brothers

 

[PollyannaMom]

Sir William Herschel - King George III’s official Court Astronomer,
and his sister Caroline - discoverer of Comet C/1786 P1

 

[E&Cmom]

Figure skaters:

Maia and Alex Shibutani
Peter and Kitty Carruthers

 

[Imzadi]

Liza Minnelli & Lorna Luft. (Mom: Judy Garland)

 

[Imzadi]

Mary Kate & Ashley Olsen

 

[Imzadi]

George and Ira Gershwin - songwriters

 

[kaytieeldr]

Jonas brothers. Have no idea what their names are. Too old.

Joe
Nick
Joe's and Nick's brother

Mary Kate & Ashley Olsen

and Elizabeth
--
The Wayanses:
Dwayne
Keenan Ivory
Damon
Kim
Shawn
Marlon
--
John and Ellen Travoltan
--
Ann and Nancy Wilson
--
Eddie and Alex van Halen