The actress left SNL after seven years in 2007, but has returned to make cameo appearances on several occasions.
Rudolph said she'll never stay away from Saturday Night Live too long because she loves being in front of a live audience.
"It's a legal drug, because I'm totally addicted to it. And [SNL creator] Lorne [Michaels] knows it, that's why he always calls me, like, 'We need a [Michelle] Obama'," she told LimeLife.
Rudolph also revealed that working on other film and television projects provided a change from SNL's fast-paced schedule.
She explained: "SNL is a live variety show, which isn't comparable to anything else. The first film I did after leaving SNL was Away We Go, and I remember feeling like, 'Wow, this is really slow.'
"Having done SNL for so long, and having it be such a part of my life, [film] felt so slow. You're used to having laughs and playing to an audience. Also the exhilaration of performing live. It's something that feels like home for me, and I feel like I need a fix every once in a while."
Rudolph currently stars in Up All Night, which airs Wednesdays at 8/7c on NBC.
Saturday Night Live kicks off its new season this weekend on NBC with host Alec Baldwin and musical guest Radiohead.
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Watch Maya Rudolph in SNL's 'Bronx Beat' below: