Composed by Michael Giacchino for Pixar's animated film Up, released in 2009, Married Life accompanies one of the most remembered wordless sequences in modern animation. The piece follows Carl and Ellie from marriage through old age, reprising the same melody in different moods to mark their joys and losses. In recent years the theme has spread widely on TikTok, YouTube and Instagram, where creators reuse it for ageing timelines, relationship montages and then-and-now comparisons. Its familiarity and simple piano line keep it popular whenever a short clip needs a whole life story behind it.