At16,WalkergraduatedfromBalletRambertSchoolinTwickenham,beganhercareerasadancer,buthadtoabandondancingafteraleginjuryattheageof18.Shethendecidedtobecomeanactress.ShemovedfromtheDramaCentreinLondontotheRoyalShakespeareCompany,wheresheplayedbitpartsforsixmonthsbeforegraduatingtosmallrolesontelevision. WalkerlandedthetitleroleinthetelevisionseriesLornaDoonebeforem...(展开全部) At16,WalkergraduatedfromBalletRambertSchoolinTwickenham,beganhercareerasadancer,buthadtoabandondancingafteraleginjuryattheageof18.Shethendecidedtobecomeanactress.ShemovedfromtheDramaCentreinLondontotheRoyalShakespeareCompany,wheresheplayedbitpartsforsixmonthsbeforegraduatingtosmallrolesontelevision. WalkerlandedthetitleroleinthetelevisionseriesLornaDoonebeforemakingherfeaturedebutinShogunMayeda(1991).InthatsameyearsheappearedinLesEquilibristesandinMikeNewell'sEnchantedApril,inwhichsheplayedanaristocrateagertoescapetheattentionsofherpersistentmaleadmirers.Walkerfirstgarneredinternationalattentionin1992asasingle-mindedEnglishmemberofanIrishterroristgroupinPhillipNoyce'sPatriotGames.In2003shehadastarringroleintheBBCdramaseriesStateofPlay. Between2005–2007,WalkerplayedAtiaoftheJuliiinthebothseasonsoftheHBO/BBC2televisionseriesRome.HerperformanceearnedheraGoldenGlobenominationin2005for"BestPerformancebyanActressInATelevisionSeries–Drama."ShenextplayedthesinisterCatherineBraithwaiteinDeusExMachina,atwo-episodestoryoftheBBCtelevision"coldcase"crimeseriesWakingtheDead,whichalsoairedinJanuary2007.InMay2007,WalkerappearedasLadyBessSedgwickinITV'sMarple:AtBertram'sHotel,andthenplayedsugarheiressEllisSamuelsintheCBStelevisiondramaCane,whichpremiered25September2007. InMay2008,WalkerwascastasSisterClariceWillow,headmistressofaprivatereligiousschool,inSyfy'sBattlestarGalacticaprequelseriesCaprica.In2011shegueststarredasRannaSeneschal,leaderoftheundergroundcityofPraxis,onSanctuary. Sheisoneoffoursiblings.Walkerhastwochildrenfromtwopreviousrelationships,Giorgio(b.1993)andDelilah(b.2000).ShecurrentlylivesintheUnitedStates.On23October2008,WalkermarriedformerBritishsoapstar,LaurencePenry-Jones,mostfamousforhisroleasDr.OliverBergintheBBCsoap,Doctors