Aspiring Liberal candidate Cathy Bennett says former premier Kathy Dunderdale should resign her seat in the house of assembly sooner rather than later.

Dunderdale stepped down last week as premier, but is staying on for the time being as the MHA for the St. John's district of Virginia Waters.

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Kathy Dunderdale stepped down last week as Newfoundland and Labrador's 10th premier. (The Canadian Press)

Bennett, who announced she would seek the Liberal nomination in that district moments after she lost the Liberal leadership race in November, said a byelection should be called soon.

"I fully expect that she'll resign, and ... I hope she'll resign quickly," said Bennett, who formally announced her candidacy for the Liberal nomination in the district on Wednesday.

"The seat deserves to be represented by somebody who is active and engaged — not only in the political world, but in the community."

Dunderdale has not commented on her political future since announcing her decision on Jan. 22 to step down as premier.

Bennett is the latest high-profile Liberal to announce plans to run in the next provincial election. Earlier this week, former MP Siobhan Coady announced she will seek the party's nomination in St. John's West, as will former candidate George Joyce.

Bennett, who runs a number of companies, said no one should be surprised to see her launch a campaign.

"I was very straightforward that my intention was always to seek the nomination for the Liberal party in my home district, which is Virginia Waters, and that's exactly what I'm going to do, regardless of who may decide to run for the Progressive Conservatives or the NDP," Bennett told Here & Now's Debbie Cooper.