She is also known for her roles in Jam & Jerusalem as Natasha "Tash" Vine, Miranda as Tilly, I'm Alan Partridge as Sophie, Parents as Jenny Pope, Set the Thames on Fire as Colette in 2015, Zapped as Slasher Morgan, and her guest appearances as the fictional Prime Minister of Finland Minna Häkkinen in the US TV series Veep.

Phillips also co-starred in Pride and Prejudice and Zombies as Mrs Bennet and in the role of Shazza in all four films of the Bridget Jones franchise.

She then co-wrote and performed the one-woman show Benadetta, the Life of a Lesbian Nun in Renaissance Italy, based on a true story.

[3] Phillips performed at nine consecutive Edinburgh Fringe Festivals, appearing in shows including Ra-Ra-Rasputin, Arthur Smith's version of Hamlet (as Ophelia) and Cluub Zarathustra with Simon Munnery, Stewart Lee, Richard Thomas, Julian Barratt and Lori Lixenburg.

[citation needed] She had a starring role in the short-lived 1999 British comedy series Hippies with Simon Pegg and Julian Rhind-Tutt.

[citation needed] Phillips garnered a nomination for best female newcomer at the 1999 British Comedy Awards as she, along with Fiona Allen and Doon Mackichan, co-created, wrote, and performed in Smack the Pony.

[6] She also played cameo roles in Mean Machine, Birthday Girl, and Born Romantic, and wrote episodes for the animation Bob and Margaret.

[11] In the second series of Green Wing, Phillips played the character of Holly,[12] whose appearance threatens the blossoming relationship between Mac (Julian Rhind-Tutt) and Caroline (Tamsin Greig).

[18][19] In 2012, she played the lead role in the Sky 1 comedy Parents and also appeared in the CBeebies television series Justin's House.

[24] In the United States, Phillips has made five appearances in the HBO comedy series Veep as Minna Häkkinen, a fictional Finnish prime minister.

[citation needed] Phillips appeared in Pride and Prejudice and Zombies (2016) as Mrs Bennet, and as Shazza in Bridget Jones's Baby.

[citation needed] In 2016, she presented the one-off BBC documentary A World Without Down's Syndrome?, which examined the potential impact of non-invasive prenatal testing (NIPT).

[37] She is a patron of Blue Apple Theatre (Hampshire, UK) which specialises in creating performance work with adults with a learning disability.