"John & Yoko", the first side, a recording made on 22 and 27 April 1969, is of Lennon and Ono calling to each other, through a range of emotions, over the sound of their heartbeats. Lennon described the heartbeats as being "like African drums", and the piece being "like an extended, very extreme John and Marsha that was out years ago by Stan Freberg. It really makes your hair stand on end."
"Amsterdam", the second side, had been recorded first, in a hotel room in Amsterdam, Holland, during 25–31 March 1969. The piece consists of interviews, conversations and captured sounds during the couple's "Bed-In" honeymoon. An early form of what would become "John John Let's Hope for Peace" forms the beginning of "Amsterdam". Lennon sings a brief excerpt of the Beatles song "Good Night".
Wedding Album was initially released on Apple on 20 October 1969 in the US,[nb 1] and 7 November 1969 in the UK.[nb 2] The record came as an elaborate box set designed by John Kosh, including sets of photos, drawings by Lennon, a reproduction of the marriage certificate,[nb 3] a picture of a slice of wedding cake (inside a white sleeve), and a booklet of press clippings about the couple. The album did not chart in the UK, but managed to peak at number 178 in the US. The album was available on vinyl, cassette tape and 8-track tape, each with the same deluxe packaging. The album was also advertised through magazine print advertisements, which Lennon and Ono's previous two albums had not. The album was reissued in 1997 through Rykodisc with three bonus cuts – two of them B-sides by The Plastic Ono Band composed by Ono.
When Wedding Album was released, at least one music press reviewer was led to believe that the album was more experimental than it actually was. Richard Williams, who had been given two single-sided test pressings for his Melody Maker review, each with a blank side featuring only an engineer's test signal, took it to be a double album. Reviewing it as such, he noted that sides two and four consisted entirely "of single tones maintained throughout, presumably produced electronically". This led Lennon and Ono to send the following telegram to Williams:
DEAR RICHARD THANK YOU FOR YOUR FANTASTIC REVIEW ON OUR WEDDING ALBUM INCLUDING C-AND-D SIDES. WE ARE CONSIDERING IT FOR OUR NEXT RELEASE. MAYBE YOU ARE RIGHT IN SAYING THAT THEY ARE THE BEST SIDES STOP WE BOTH FEEL THAT THIS IS THE FIRST TIME A CRITIC TOPPED THE ARTIST. WE ARE NOT JOKING. LOVE AND PEACE STOP JOHN AND YOKO LENNON.
|1.||"John & Yoko"||22:44|
|CD bonus tracks|
|3.||"Who Has Seen the Wind?" (Ono)||2:05|
|4.||"Listen, the Snow Is Falling" (Ono)||3:25|
|5.||"Don't Worry Kyoko (Mummy's Only Looking for Her Hand in the Snow)" (Ono)||2:35|
- John Lennon – guitars, keyboards, heartbeat sounds, vocals
- Yoko Ono – vocals, rare sounds, heartbeat sounds
- Klaus Voormann – electric guitar, bass guitar
- Nicky Hopkins – piano, chimes
- Hugh McCracken – piano, chimes
- US Apple SMAX 3361
- UK Apple SAPCOR 11
-  Lennon and Ono's marriage was held in Gibraltar on 20 March 1969.