Romy Reiner and her brother Jake Reiner stepped out for a walk on the beach in their first joint sighting since the death of their parents.

On Monday, the siblings put on a united front outside a Malibu, Calif., beach house where they’ve reportedly been staying since their parents, Rob and Michele Reiner, were tragically murdered earlier this month.

In exclusive photos obtained by Page Six, the siblings appeared downcast while walking side-by-side.

They were joined by Jake’s girlfriend, Maria Gilfillan, and another female.

Romy Reiner and Jake Reiner walking on a beach.
Romy and Jake Reiner were seen walking on a beach in Malibu, Calif., on Monday.
Romy Reiner and Jake Reiner walk barefoot on the beach.
The siblings put on a united front after the deaths of their parents, Rob and Michele Reiner.At one point, the group was photographed standing in a circle and talking.Romy wore a black sweater, jeans and a hat, while Jake wore a T-shirt, gray shorts and a hat for the outing.

Earlier in the day, Romy was seen being comforted by loved ones outside the home.

Romy, who lived across the street from her famous parents, was first seen outside the beach house on Saturday.

The date marked her 28th birthday, and she spent it surrounded by loved ones.

Romy Reiner and Jake Reiner walk along the beach with Jake's girlfriend and a friend in Malibu, California.
They were joined by Jake’s girlfriend, Maria Gilfillan.London Entertainment for NY Post
Romy Reiner, Jake Reiner, Jake Reiner's girlfriend, and a friend walking barefoot on the beach with a dog.
Romy, Jake and Gilfillan appeared to be engaged in conversation.London Entertainment for NY Post
Romy Reiner and Jake Reiner on the beach with Jake's girlfriend and a friend.
At one point, they turned to talk to each other.London Entertainment for NY Post

Jake joined his sister at the property on Sunday afternoon and was seen taking a somber stroll on the beach with his girlfriend.

The 34-year-old and Romy have been staying under the radar since their parents were murdered at their Brentwood, Calif., home on Dec. 14.

Romy discovered Rob and Michele’s bodies after she went to check up on them when they missed a massage therapy appointment, sources told The Post.

Romy Reiner and Jake Reiner walking barefoot on a beach with Jake's girlfriend and a friend.
Romy wore a black sweater and jeans.London Entertainment for NY Post
Romy Reiner walking barefoot on a beach, holding a dog leash.
She covered up with a hat.London Entertainment for NY Post
Romy Reiner barefoot on a sandy beach with a dog.
The 28-year-old held onto a leash.London Entertainment for NY Post
Romy Reiner and Jake Reiner with his girlfriend and a friend walking barefoot on the beach.
Another female joined the group.London Entertainment for NY Post
Romy Reiner and Jake Reiner walking barefoot on a beach with a friend.
Jake wore a T-shirt and shorts.
The legendary director, 78, and Michele, 70, were found with multiple stab wounds to their bodies, according to their death certificates.According to the Post, the couple’s youngest son, Nick, was being investigated as a person of interest ahead of his arrest later that evening.

The 32-year-old, who has a past of violence and substance abuse, was reportedly diagnosed with schizophrenia and had his meds changed leading up to the killings.

Romy Reiner and Jake Reiner with his girlfriend and a friend walking on a beach.
He was seen gesturing to his girlfriend.London Entertainment for NY Post
Romy Reiner and Jake Reiner walking on a beach.
The couple was also seen alone.London Entertainment for NY Post
Romy Reiner and Jake Reiner's girlfriend walking barefoot on a beach.
At one point, they held hands.London Entertainment for NY Post
Romy Reiner and Adam Silberberg being comforted by a family friend at the Reiner family beach house in Malibu.
Earlier in the day, Romy was seen hugging a loved one.London Entertainment for NY Post
Rob Reiner and Michelle Reiner with their children Jake, Nick, and Romy.
Rob and Michele were found dead on Dec. 14.@michelereiner/Instagram
Michele and Rob Reiner posing together.
Their deaths were ruled a homicide.
Sources described the screenwriter’s behavior as “alarming.”Nick is behind bars at Twin Towers Correctional Facility in Los Angeles and will be arraigned on Jan. 7.

He reportedly plans on pleading not guilty.