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Amanda, who turned 28 on 3 April, wore a fluorescent yellow two piece and flip flops for the photos, as well as sporting an enviable deep tan.
Amanda is currently on holiday in Cabo San Lucas in Mexico
"Spring break," was the caption on one photo which showed the California-born starlet lying on a sun bed in an exotic resort at Cabo San Lucas, while another read "Thank you everyone for all the birthday wishes."
Amanda Bynes back to her old self in post-rehab photos
Amanda's fans will be pleased to see her enjoying some down time and sporting a healthy sun-kissed look after her turbulent experiences in 2013.
Amanda turned 28 on 3 April
The actress has gone from strength to strength since leaving rehab last year and has shared several photos proving she's back to her happy and healthy self.
Amanda Bynes says she's 'doing great' after five months in rehab
Amanda is now studying at the Fashion Institute of Design & Merchandising and in March she posted snaps from an evening affair organised by the fashion school.
The star's sister Jillian shared this picture of the siblings as well as her birthday wishes
Posing alongside her parents Rick and Lynn in one photo, Amanda was elegantly dressed in beige, high-waisted trousers and a black sleeveless top.
Amanda Bynes hospitalised for mental health evaluation
Amanda, who now simply describes herself as a fashion student in her Twitter biography, looked glowing with her blonde locks styled into curls, a fresh change to her previous platinum blonde shade and at one point, streaked blue wig.
Amanda and her family at her fashion institute debut
From July 2013 the She's the Man star spent five months in a Malibu treatment facility, after being involuntarily hospitalised for a mental evaluation.
The formerly troubled star was accused of being drunk, trespassing and starting a fire in the grounds of a retirement community in California which resulted in police being called and subsequestly taking Amanda to hospital.
When she reached her worst point last year, Amanda hit headlines for openly criticising family members on Twitter, as well as celebrities such as Rihanna and Drake, although as is evident in the star's latest pictures, she is now enjoying a loving relationship with her family once again.