A Wizard, a True Star is the fourth studio album by American musician Todd Rundgren, released on March 2, 1973 by Bearsville Records. It marked a departure from his previous album, Something/Anything? (1972), featuring fewer straightforward pop songs, a development he attributed to his experimentation with psychedelic drugs and his realization of "what music and sound were like in my internal environment, and how different that was from the music I had been making."

The album was produced, engineered, and largely performed by Rundgren alone. He envisioned it as a hallucinogenic-inspired "flight plan" with all the tracks segueing seamlessly into each other, starting with a "chaotic" mood and ending with a medley of his favorite soul songs. At the time of release, he stated that Wizard intended to advance utopian ideals; later, he said that the album had no definite meaning. No singles were issued from the album, as he wanted the tracks to be heard in the context of the LP. With 19 tracks, its nearly 56-minute runtime made it one of the longest single-disc LPs to date.

Upon release, A Wizard, a True Star received widespread critical acclaim, but sold poorly, reaching number 86 on the U.S. charts. According to Rundgren, "the result was a complete loss of about half of my audience at that point." Rundgren formed Utopia, his first official band since the Nazz, to tour in support of the album. Their technologically ambitious stage show was cancelled after about two weeks on the road. A Wizard, a True Star has since been recognized for its influence on later generations of bedroom musicians.

In February 1972, Something/Anything? was issued as Todd Rundgren's third solo album, and his first credited under his own name rather than the sobriquet "Runt". It included many songs that would become among his best-known, as well as extended jams and studio banter. After the album's success, critics hailed Rundgren as the spiritual successor to the 1960s studio experiments of the Beatles and the Beach Boys' Brian Wilson; Rundgren became uncomfortable when these descriptions also came to include "the male Carole King" in reference to the album's singles "I Saw the Light" and "Hello It's Me". "With all due respect to Carole King," he said, "It wasn't what I was hoping to create as a musical legacy for myself."

Rundgren returned to New York, and for the first time in his life, started experimenting with psychedelic drugs. To his recollection, this included DMT, mescaline, psilocybin, and possibly LSD. He began to think that the writing on Something/Anything? was largely formulaic, and sought to create a "more eclectic and more experimental" follow-up album. His music tastes also had started to lean toward the progressive rock of artists such as Frank Zappa, Yes, and Mahavishnu Orchestra. He explained, "It wasn't like I suddenly threw away everything that I was doing before and decided that I was going to play the music of my mind", rather, the experiences allowed him "to actively put some of [my songwriting habits] away and to absorb new ideas and to also hear the final product in a different way." However, he "wasn't really aware, at that time, that I'd make such a radical shift".

The sound and structure of Wizard was heavily informed by Rundgren's hallucinogenic experiences. He said, "It was very ADD ... and I wouldn't dwell on whether a musical idea was complete or not." Rundgren and keyboardist Moogy Klingman established a professional recording studio, Secret Sound, to accommodate the Wizard sessions. Located at Manhattan's 24th Street, the studio was designed to Rundgren's specifications and was created so that he could freely indulge in sound experimentation without having to worry about hourly studio costs. To this effect, he said, "I had the idea that a synthesizer was supposed to sound like a synthesizer, instead of sounding like strings or horns."

Two or three months were spent building the studio; the expenses were ultimately paid by the royalties gained from Something/Anything? and the $10,000 advance given to Klingman for his second solo album (Moogy II, co-produced by Rundgren). Rundgren remembered: "I have to say that, in some sense, A Wizard, a True Star was kind of rushed through because the studio wasn't finished. ... a lot of it seemed sorta ad hoc." According to Klingman, the studio equipment "was breaking down all the time" and was "barely held together with band-aids and bubble gum." The two differed in their recollection of the first song recorded for the album; Rundgren thought it was "Sometimes I Don't Know What to Feel", whereas Klingman believed it was "International Feel".

Rundgren provided a host of instruments and equipment, including vibraphones, organs, keyboards, Fairchild equalizers, and a Stephens 16-track tape recorder. Depending on the track, he either played all of the instruments alone or with assistance from Moogy & the Rhythm Kingz, a band that included Klingman, drummer John Siomos, keyboardist Ralph Schuckett, and bassist John Siegler. Rundgren encouraged the musicians to contribute any ideas they felt would benefit the music. According to Siegler, "when Todd needed guys to play on his record, we were already there. It was like a club. Secret Sound was our clubhouse, and suddenly Todd was the leader of the club." He said a typical session involved Rundgren arriving with a piece of music, written on piano or guitar and often untitled, which the band would learn by ear and create charts for if necessary. Vocals were not recorded until after a basic track was completed. Rundgren was also the sole engineer; as Klingman recounted, "he would go in the control room and set levels and come out and then he would run back in and adjust the levels. It was astonishing to watch, but that's how he liked to work."