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2003–2007 (International), 2003–2011 (Asia), 2003–2015 (UK)
2007–2018 (USA), 2007–present (International), 2011–present (Asia)
The new branding was introduced in 2015, under the "one brand" strategy. This logo looks much like the 1990's logo.
The new branding was introduced in 2016 in Australia only, under the “one brand” strategy. 
On January 10, 2018, Diet Coke introduced a complete overhaul of their brand packaging, with the inclusion of four new flavors for the U.S. and Canadian markets.
The new branding also included a slightly modified version of the previous logo. Some noticeable changes include the "Diet" script being much smaller, "Diet" and "Coke" using a singular color instead of two tones, the "k" and "e" in "Coke" no longer connecting, and serifs removed from the "k". The final product looks similar to the 1994 logo.