Joining a host of stars at the event in Kensington Gardens, former radio host Fearne dressed her growing baby bump in a lovely, flowing patterned dress.
Showing off her eclectic fashion taste and love of prints, Fearne teamed her pastel frock with a red leopard print clutch and red metallic heels.
Fearne and Jesse - who have a two-year-old son, Rex - are expecting their second child together.
Celebrity Juice captain Fearne announced her baby joy in February while also revealing that she will be stepping down from her Radio 1 Live Lounge show to pursue other opportunities.
However, earlier this week, Fearne was forced to clear up rumours once again about whether she will return to work after her second child is born.
Fearne corrected reports that she was planning to be a stay-at-home mum, by saying she will indeed return to work.
Fearne tweeted: "For many who are reporting I'm not returning to work after the baby. Absolute rubbish. I'm so excited about getting back to work at some point. I'm just not going to put pressure on myself to do so too soon."
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Relive Fearne's old maternity fashion:
Copyright: Rex Features