Heather Locklear has been seen acting erratically in Malibu, California, raising renewed concerns for her well-being.

In photos obtained by The Post, the 61-year-old “Melrose Place” and “Dynasty” actress is seen balancing on the ledge of an office building after an undisclosed appointment on June 29.

Locklear, who has a well-known history of substance abuse and mental health struggles, is pictured holding onto the building’s pillars. She was wearing black flip-flops, a camouflage short-sleeve shirt that hung off one shoulder, and matching joggers.

The six-time Golden Globe nominee also appeared to be reading aloud from what looked like a journal while sitting on the outdoor steps, as shown in disturbing video footage and photographs.

At one point, a disheveled Locklear aggressively pointed at something in the book, slammed it shut, and continued talking to herself before making her way down the stairs.

Friends are allegedly worried that the veteran TV star, known for her ability to revive struggling shows like “Melrose Place” and “Spin City,” may have started drinking again, according to multiple sources.

A man, presumably her fiancé Chris Heisser, also 61, dropped her off for the appointment and waited for nearly an hour in the parking lot until she finished taking a moment for herself.

Eventually, Locklear was seen sprinting across the street and hopping into the man’s SUV.

The Post has reached out to a representative for Locklear for comment.

Locklear made her return to acting with the Meghan McCain-produced 2021 Lifetime movie “Don’t Sweat the Small Stuff: The Kristine Carlson Story.”

This was her first role since her 2018 “overdose,” which was followed by a rehab stint and her arrest for allegedly assaulting an EMT worker called to her home during a domestic dispute.

In 2020, “The Perfect Man” actress happily celebrated one year of sobriety.

“I’ve learned that no matter what happens, or how bad it seems today, life does go on, and it will be better tomorrow,” she wrote in an Instagram post at the time, attributing the quote to poet Maya Angelou.

Locklear and Heisser got engaged in April 2020, though they met as teenagers and graduated together from Newbury Park High School near Los Angeles in 1979.

They rekindled their relationship in 2017 but broke up multiple times before she reportedly got sober in 2019.

Heather Locklear said in October 2021 that she was in no rush to marry her fiancé, Chris Heisser. She stated, “I’m like, ‘You’re my man for the rest of my life, whether we get married or not.’ [A wedding] is so not important. We’re together, and we love each other and support each other. And really that’s all that matters.” She was previously married to Tommy Lee from 1986 to 1993 and Richie Sambora from 1994 to 2007, with whom she shares a daughter, Ava Sambora, born in 1997. Locklear expressed gratitude for getting older, saying, “I’ve always loved getting older because it means I’m alive. I’m so grateful. I don’t really give a hoot. I don’t give a hoot about how I look. My parents still love me. My daughter loves me.”