The director, who helmed both of the first Hangover instalments and returns for the third, posted the photographs on his Instagram.
will play an expanded role in the new film.
The plot of The Hangover Part III will reportedly feature "no wedding" and "no bachelor party".
Phillips has confirmed that this will be the final instalment in the lucrative series.
Watch Bradley Cooper and Ed Helms discussing The Hangover Part II with Digital Spy below: