They mention Liz in the article among all Lost actors who were also on Once Upon A Time.
Many ‘Lost’ Actors Have Appeared
As a result of the creators’ work on Lost, many actors from that series have appeared on Once Upon A Time, in a variety of capacities. Once series regulars Emilie De Ravin (Belle), Lana Parrilla (Regina), and Rebecca Mader (Zelena) are all Lost alums. De Ravin having played 815 survivor Claire Littleton, Parrilla as an Other named Greta and Mader as Charlotte Lewis, a member of the scientific team who arrived on the island via freighter.
Additionally, Lost regular Jorge Garcia (who played Hugo ‘Hurley’ Reyes) appeared on Once as Anton/Tiny, Elizabeth Mitchell (Juliet Burke) played Ingrid and frequent guest star Alan Dale (Charles Widmore) played King George/Albert Spencer.