"Sealed with a Kiss" is a song written and composed by Peter Udell and Gary Geld. It was most successful as a 1962 hit single for Brian Hyland, who recalls Geld saying the song was "based on, but not totally based on, a Bach finger exercise."

The original recording of "Sealed With a Kiss" was that by the Four Voices which was released as a single in May of 1960 without becoming a hit.

The lyrics are from the point of view of one of two lovers who have had to part ways over the summer. The narrator promises the lover who has had to leave that they will send that worthy their love and dreams in daily letters "sealed with a kiss;" they also bids the other lover pledge, under seal of a kiss, that they will reunite in September.

In 1989, Jason Donovan released a cover version as the fourth single from his debut album, Ten Good Reasons. This was actually the last track to be recorded for Ten Good Reasons but with an appropriately atmospheric SAW makeover, it was also a perfect choice for pop's latest idol.

Itself then a rare feat, Sealed With A Kiss debuted at #1 in the UK, making Jason not only the first Australian artist to do so, but also the first to score a #1 single and album simultaneously. Another international smash, the single featured a new B-side, Just Call Me Up, a clubby Balearic groove built around unused original vocals from the album track Change Your Mind.

His version went straight into the UK Singles Chart at number one and stayed there for two weeks, also reaching the top in Finland and Ireland.​​