"A Breathtaking Guy" is a 1963 song written and produced by Smokey Robinson and released first by Motown singing group The Supremes (1963) and later by The Marvelettes (1971). The single was originally released under the title "A Breath Taking, First Sight Soul Shaking, One Night Love Making, Next Day Heartbreaking Guy" by The Supremes, but was shortened after its official release. All three Supremes members - Diana Ross, Florence Ballard and Mary Wilson - sung the chorus with the original title together.
One of the rare singles to feature the Supremes singing all lead vocals, it also was their highest charting single at this point, reaching number 75 on the Billboard Hot 100. The group was jokingly referred to at this time as the "no-hit Supremes" by the Motown staff. However, their next single, "When the Lovelight Starts Shining Through His Eyes", would break the group's "no-hit" streak. It would also mean that, with the exception of Ballard's and Wilson's ad-libs on the 1964 single "Baby Love", this would be the last time any member other than Ross would have a lead part on a single for the rest of the decade.
Much like their earlier single, "Your Heart Belongs to Me", Smokey Robinson produced the song with the same sound that had provided hit singles for early Motown star Mary Wells. The Supremes would sing background for Wells on her hit "You Lost the Sweetest Boy" with The Temptations. This would be the last single Robinson would produce for the group until 1969; this is due to the production team of Holland–Dozier–Holland having a very strong hold on the Supremes' released material from late 1963 to early 1968.
In 1971, song was issued as the final single for The Marvelettes. The single failed to chart.