A sketch of a UFO by John Lennon is up for auction, along with his sci-fi magazines and a lock of his hair.

The Beatles singer-songwriter was reportedly fascinated by alien life, even writing about them, and was believed to have had 'UFO experiences'.

He drew the rarely seen sketch of a flying saucer in the 1950s or 1960s, then years later saw a UFO outside his apartment window traveling over New York's East River on August 23, 1974.

According to his lover May Pang, who was Yoko Ono's secretary, the star spotted a flying saucer - screaming at the window 'wait, take me with you' to what he believed was a UFO.

In the main sketch up for auction, a cartoonish flying saucer is depicted above a woman's head with the letters 'CYN' believed to refer to his ex-wife Cynthia.

Above the flying saucer is written a large 'JL' as the spaceship hovers over what is thought to be Cynthia, with birds and a sun in the sky.

The sketch of a cartoonish flying saucer is depicted above a woman's head with the letters CYN, believed to refer to his ex-wife Cynthia

May Pang - secretary of Yoko Ono - who John Lennon had an affair at the end of 1970's - at the Beacon Theater in New York City

A double-sided piece (right) is believed to show someone smoking a marijuana joint and on the flip side a large nosed person with a sad face (left)

A second drawing shows Cynthia sketched and bears his initials 'JWL' and in another two large nosed smiling faces in a yin-yang style.

A double-sided piece is believed to show someone smoking a marijuana joint and on the flip side a large nosed person with a sad face.

The four drawings were made in crayon and pencil dating between 1950s- 1960s and sent to a long-term Liverpudlian friend who he bonded with over space while performing with The Quarrymen.

The out-of-this world drawing from 'Across the Universe' and others, are being sold by GWS Auctions later this month in Los Angeles, California.

A collection of John Lennon's sci-fi magazines sent to the fellow enthusiast, will also go under the hammer.

A second drawing shows what is thought to be Cynthia sketched, bearing John Lennon's his initials of JWL

A collection of John Lennons sci-fi magazines sent to his fellow enthusiast friend, will also go under the hammer in LA

John Lennon's lock of hair and towel piece cut during filming of A Hard Days Night from 1964

Brigitte Kruse, owner of GWS Auctions, said: 'It's an interesting story and certainly not surprising given John Lennon's fascination with UFOs, space and aliens.

'It seemed like a natural friendship based on common interests.

'This collection has never been put up for sale at auction before so collectors will have the first-chance to bid on something pretty remarkable.

'John Lennon's passion for extra-terrestrial has been well documented throughout his life.

'He was known to talk about it and read about it and in 1974, while with May Pang, he reported seeing a UFO fly over the Hudson from his apartment in New York.

'Based on the friendship struck, John and his fellow friend from Liverpool were in touch even after he moved to the U.S.

A John Lennon and Yoko Ono Milk & Honey Promotional Jacket from circa 1984 will also be auctioned at the end of this month

A ticket for the Beatles final scheduled concert in Candlestick Park San Francisco in August 29, 1966

'Anything that gives us a look into John Lennon, a member of the most famous rock and roll band of all time, The Beatles, is always very special.

'We are honoured to be able to have them in our Archives of Hollywood & Music Auction to take place March 30th in Los Angeles.'

The items feature alongside a lock of his hair and towel piece cut during the filming of 'A Hard Day's Night', and a Yoko and John 'Milk & Honey' Promotional Jacket from around 1984.

A ticket from the Beatles final scheduled concert at Candlestick Park, San Francisco in 1966, is also up for grabs as well as another rare and unused concert from the same year at Shea Stadium in Flushing, New York.

The lot is due to go under the hammer on March 30 in LA.