Holly Madison has a "hard time" waking up in the mornings.

The former Playboy Playmate and former girlfriend of the late Playboy founder Hugh Hefner has turned to red light therapy to give her an energy boost in the mornings.

She told Us Weekly magazine: "I have a hard time waking up. So I always start my day with red light therapy."

The 'Girls Next Level' podcast co-host, who is in her early forties, is a busy mother-of-two and so she tries to fit in some exercise right before she gets some shut-eye.

She said: "If I didn't get a chance to work out earlier in the day, I usually fit in some circuit training before bed."

Holly was late diagnosed with autism and has found it a "really interesting journey".

The TV star was diagnosed with autism last summer, and Holly has admitted that she actually "suspected" that she was "on the spectrum for a while".

Speaking to 'Extra', Holly shared: "I suspected I was on the spectrum for a while after my mom told me some things about my childhood and I started looking up the symptoms and putting two and two together.

"I finally got a diagnosis this last summer, so it’s been a really interesting journey."

Holly opened up about her autism diagnosis last year, explaining how it influences her relationship with other people.

She said on the 'Talking to Death' podcast: "The doctor told me that I have high executive functioning, which means I can pretty much go about my life and do things ‘normally'.

"I think because I’m more quiet, I’ve only recently learned to make eye contact, I’m often in my own thoughts, things like that, so people take that as offensive."

Holly also acknowledged that she's "not on the same social wavelength as other people."

However, she hopes no one is offended by her behaviour.

She explained: "I'm just not on the same social wavelength as other people but don’t take it personally. So I like being able to explain that."