| Season Number: | 1 |
| Bgcolour: |
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| Num Episodes: | 23 |
| Network: | ABC |
| Next Season: | Season 2 |
| Episode List: | List of Ugly Betty episodes |
The first season of the American dramedy television series Ugly Betty began airing on September 28, 2006 and concluded on May 17, 2007.
In addition to the twenty-three regular episodes in season one, a special, "The Beautiful World of Ugly Betty", was aired on April 12, 2007. Another special, which was a half-hour update recapping the first ten episodes, aired during the month of January 2007 on local ABC affiliates and various cable networks.
For the first season of Ugly Betty, nine characters were initially included in the main cast.
Michael Urie and Kevin Sussman were originally credited as Special Guest Stars but were upgraded to regulars in episode 14. Although Sussman's character was written out almost immediately after, in episode 15, he was credited as a regular for the rest of the season.
Rebecca Romijn was added to the show’s main cast in episode 13, after her character was initially played by (a heavily disguised) Elizabeth Payne.
The first season also saw Katharine McPhee and Martha Stewart make cameo appearances as themselves.
See also: List of Ugly Betty episodes.