Shay Mitchell has been using face masks for more than 18 years.

The 29-year-old actress - who was named the face of the skincare company Bioré in April last year - has admitted she has been applying various creams and nourishing sheets to her face ever since she was a child, but has started to realise she ''actually needs'' to use them more now she is getting older.

The former 'Pretty Little Liars' star posted a picture of her sporting a grey lotion on her face alongside two of her friends on social media to share her beauty secrets.

Speaking about her go-to cosmetic product on her Instagram account, she wrote: ''Friends who mask together stay together... no but for real, we have been doing masks for 18+ years (except now we are realizing how much we actually need them) work perk of being a @bioreus ambassador - face masks and pore strips for everyone! #missingmygirlsalready (sic).''

And the brunette beauty enjoys a a ''mini spa day'' every week, and devotes each Sunday to pampering herself and repairing her skin after wearing make-up all week.

Speaking previously, she said: ''You really do have to take a day out of the week to kind of have your own mini spa day ... I think for me, it's kind of getting into a routine of things. I think it's about taking those times to kind of replenish your skin.''

Shay also believes it is very important to follow a healthy diet and drink lots of water to keep your skin looking healthy.

She explained: ''My diet is everything in moderation. So, if I want to eat that whole pizza, I'm going to eat that whole pizza. But then I'm going to go to the gym and maybe do two workouts the next day - but also because I enjoy it. So, I think for me it's never holding back on anything because I'm the kind of person that's like, 'OK, you never know if tomorrow is going to come, so I'm going to eat this cupcake.' But I'll work out after it. If you told me I could never have chocolate cake for the rest of my life, I would be OK with it. Pizza? No.''