"Together Again" is a song by American singer Janet Jackson from her sixth studio album, The Velvet Rope(1997). Produced by Jackson and Jimmy Jam and Terry Lewis, it was released as the album's second single, and achieved commercial success worldwide by selling over 6 million copies, and to date, the song is Jackson's best selling single.

The song was a tribute from Jackson to friends who had recently passed from AIDS, as stated on album booklet of The Velvet Rope. Originally written as a ballad, the track was re-arranged as a dance song. The song became Jackson's eighth number one on the Hot 100—the only U.S. chart-topper from The Velvet Rope—and peaked at number eight on the Hot R&B/Hip-Hop Songs chart. The single sold nearly six million copies worldwide, and became one of the biggest-selling singles from a female artist in the history of the UK Singles Chart, where it peaked at number four. The song is Jackson's biggest international single, reaching the top five and the top ten in many countries.

Jackson has performed the song on all of her tours since its release, as the closing number, The Velvet Rope Tour and All for You Tour while the Rock Witchu Tour saw it moved to the middle of the setlist. Also, this song was in the ending of "Janet Megamix 04".

"Together Again" is set in common time with a key of C major. Jackson's vocal chords ranges between the tonal nodes of high-tone A ₃to low-tone D ₅. The song is in a moderate tempo of 120 beats per minute with the chord progression being set like C–Gm6–Bm–A–Dm–Gm–Dm.

As the first official single from her album The Velvet Rope(after the radio-only U.S. single "Got 'til It's Gone"), the single was highly anticipated. Before its official release it was enjoying heavy airplay in North America. Some weeks after its release it debuted at number nine on the BillboardHot 100 chart dated December 20, 1997, before becoming her eighth number-one single on January 31, 1998, spending two weeks at number one, fourteen weeks inside the top ten, and a total of forty-six weeks on the chart. In Canada it peaked at number two and stayed in the top ten for many weeks, becoming one of her biggest hits there, even surpassing the success of some of her six Canadian number-one singles, due to its staying power on the chart.

In the United Kingdom the song entered the UK Singles Chart in December 1997 at number four and spent ten weeks inside the top ten; it is Jackson's biggest hit to date in the UK, with sales of over three quarters of a million. It achieved massive success in the rest of Europe as well, topping the Dutch Top 40 and the European Hot 100 Singles and charting inside the top five and the top ten of most of the European countries. The single's massive commercial and radio success helped The Velvet Ropeto top the charts of several countries throughout Europe and worldwide. It is her best-selling single to date.

Two videos were produced for the song. The one for the album version was directed by Seb Janiak and is a dance video that shows Jackson and her dancers performing in a futuristic African paradise where people are seen living side by side with wild animals such as elephants, giraffes, and wildcats. In the scene where Jackson appears to be hugging herself, dancer Nikki Pantenburg served as Jackson's body double. This version received a nomination for Best Dance Video at the 1998 MTV Video Music Awards. The one for the Deeper Remix was directed by René Elizondo, Jr. and depicts Jackson in an apartment remembering a friend in the video. Both videos are featured on the DVD edition of 2001's All for Youand the 2004 video compilation From janet. to Damita Jo: The Videos.